When it comes to the Divine Liturgy of St. John Chrysostom, there is no escaping the Trinity. One cannot remain a Unitarian and worship with sincerity in the quintessential Orthodox liturgy. I am posting chunks from the Liturgy below, to give an idea of how the Trinity permeates its content. I’ve counted the full references (e. g., “Father, Son and Holy Spirit) and the “partial” references (e. g., Father and Son). I’ve come up with something like 40 occurrences. What I’ve not counted are all the symbolic gestures (making the sign of the Cross, the priest’s blessing, etc.) that clearly bespeak the Trinity. And no doubt I’ve missed some references that I in ignorance do not know refers to the Trinity.
But in any case, inspired by the discussions elsewhere on the net (Tripp, Jennifer, Karl, the catechumen, Erica, and the Pontificator), here are the excerpts for your perusal.
For the following, I have used the Antiochian service, which is online here. I've not indicated ellipses, but one should not suppose that the excerpts below follow one another in the service.
PRIEST: Blessed is the Kingdom of the Father, and of the Son, and of the Holy Spirit: now and ever, and unto ages of ages.
PRIEST: (Aloud) For unto thee are due all glory, honor, and worship: to the Father, and to the Son, and to the Holy Spirit: now and ever, and unto ages of ages.
CHOIR: Through the intercessions of the Theotokos, O Savior, save us.
Glory to the Father, and to the Son, and to the Holy Spirit: Through the intercessions of the Theotokos, O Savior, save us.
Both now and ever, and to ages of ages, Amen. Through the intercessions of the Theotokos, O Savior, save us.
PRIEST: (Aloud) For thine is the majesty, and thine is the kingdom and the power and the glory: of the Father, and of the Son, and of the Holy Spirit: now and ever, and unto ages of ages.
CHOIR: O Son of God, who art risen from the dead, save us who sing unto thee: Alleluia.
O Son of God, who art risen from the dead, save us who sing unto thee: Alleluia.
Glory to the Father, and to the Son, and to the Holy Spirit:
O Son of God, who art risen from the dead, save us who sing unto thee: Alleluia.
Both now and ever, and unto ages of ages. Amen.
O Only-begotten Son and Word of God, who art immortal, yet didst deign for our salvation to be incarnate of the Theotokos and ever-virgin Mary; and without change wast made man; and wast crucified also, O Christ our God, and by thy death didst Death subdue; who art one of the Holy Trinity, glorified together with the Father and the Holy Spirit: save us.
PRIEST: (Aloud) For thou art a good God and lovest mankind, and unto thee we ascribe glory: to the Father, and to the Son, and to the Holy Spirit: now and ever, and unto ages of ages.
PRIEST: (quietly) O Master, Lord our God, who hast appointed in heaven orders and hosts of Angels and Archangels for the service of thy glory: cause that with our entrance there may be an entrance of holy Angels serving with us and glorifying thy goodness: for unto thee are due all glory, honor, and worship: to the Father, and to the Son, and to the Holy Spirit: now and ever, and unto ages of ages. Amen.
PRIEST: For holy art thou, O our God, and unto thee we ascribe glory: to the Father, and to the Son, and to the Holy Spirit: now and ever, and unto ages of ages.
CHOIR: Holy God, Holy Mighty, Holy Immortal: have mercy on us (Thrice)
Glory to the Father, and to the Son, and to the Holy Spirit: both now and ever, and unto ages of ages. Amen.
Holy Immortal: have mercy on us.
Dynamis!
Holy God, Holy Mighty, Holy Immortal: have mercy on us.
PRIEST: Illumine our hearts, O Master who lovest mankind, with the pure light of thy divine knowledge, and open the eyes of our mind to the understanding of thy Gospel teachings; implant in us also the fear of thy blessed commandments, that trampling down all carnal desires, we may enter upon a spiritual manner of living both thinking and doing such things as are well pleasing unto thee: for thou art the illumination of our souls and bodies, O Christ our God, and unto thee we ascribe glory, together with thy Father who is from everlasting, and thine all-holy, good, and life-giving Spirit: now and ever, and unto ages of ages. Amen.
PRIEST: Again and oftentimes we fall down before thee and beseech thee, O Good Lord who lovest mankind, that looking down upon our petition thou wilt cleanse our souls and bodies from all defilement of flesh or spirit; and grant us to stand blameless and without condemnation before thy holy Altar. Grant also, O God, to those who pray with us growth in life and faith and spiritual understanding. Grant them always blamelessly to serve thee with fear and love, and to partake without condemnation of thy Holy Mysteries, and to be accounted worthy of thy heavenly Kingdom:
That guarded always by thy might we may ascribe glory unto thee: to the Father, and to the Son, and to the Holy Spirit: now and ever, and unto ages of ages.
CHOIR: We who mystically represent the Cherubim, and sing to the life-giving Trinity the thrice-holy hymn, let us now lay aside all earthly care: that we may receive the King of all, who comes invisibly upborne by the Angelic Hosts. Alleluia, alleluia, alleluia.
PRIEST: (quietly) No one who is bound with the desires and pleasures of the flesh is worthy to approach or draw nigh or to serve thee, O King of Glory: for to serve thee is a great and terrible thing even to the Heavenly Powers. Nevertheless, through thine unspeakable and boundless love toward mankind thou didst become man, yet without change or alteration, and as Lord of all didst take the name of our High Priest, and deliver unto us the ministry of this liturgic and unbloody sacrifice. For thou alone, O Lord our God, rulest over those in heaven and on earth; who art borne on the throne of the Cherubim; who art Lord of the Seraphim and King of Israel, who alone art holy and restest in thy Holy Place.
Wherefore I implore thee who alone art good and art ready to listen: Look down upon me, a sinner, and thine unprofitable servant, and cleanse my soul and my heart from an evil conscience; and by the power of thy Holy Spirit enable me, who am endued with the grace of the priesthood, to stand before this thy Holy Table, and perform the sacred Mystery of thy holy and immaculate Body and precious Blood. For I draw near unto thee, and bowing my neck I pray thee: turn not thy face from me, neither cast me out from among thy servants; but vouchsafe that these gifts may be offered unto thee by me, thy sinful and unworthy servant: for thou thyself are he that offers and is offered, that accepts and is distributed, O Christ our God: and unto thee we ascribe glory, together with thy Father who is from everlasting, and thine all-holy, and good, and life-giving Spirit: now and ever, and unto ages of ages. Amen.
PRIEST: In the Grave with the body, but in Hades with the Soul, as God; in Paradise with the Thief, and on the Throne with the Father and Spirit wast thou, O Christ, filling all things, thyself uncircumscribed.
PRIEST: (quietly) O Lord God Almighty, who alone art holy: who dost accept the sacrifice of praise from those who call upon thee with their whole heart: Accept also the prayer of us sinners, and bear it to thy holy Altar, and enable us to offer unto thee gifts and spiritual sacrifices for our sins and for the errors of the people; And make us worthy to find grace in thy sight, that our sacrifice may be acceptable unto thee; and that the good spirit of thy grace may rest upon us and upon these gifts here offered, and upon all thy people:
PRIEST: (aloud) Through the compassions of thine Only-Begotten Son, with whom thou art blessed, together with thine all-holy and good and life-giving Spirit: now and ever, and unto ages of ages.
PRIEST: Peace be to all.
CHOIR: And to thy spirit.
PRIEST: Let us love one another, that with one accord we may confess:
CHOIR: Father, Son, and Holy Spirit: the Trinity, one in Essence and undivided.
PEOPLE: I believe in one God, the Father Almighty, Maker of heaven and earth, and of all things visible and invisible:
And in one Lord Jesus Christ, the Son of God, the Only-begotten, Begotten of the Father before all worlds, Light of Light, Very God of Very God, Begotten, not made; of one essence with the Father, by whom all things were made:
Who for us men and for our salvation came down from heaven, and was incarnate of the Holy Spirit and the Virgin Mary, and was made man;
And was crucified also for us under Pontius Pilate, and suffered and was buried;
And the third day He rose again, according to the Scriptures;
And ascended into heaven, and sitteth at the right hand of the Father;
And He shall come again with glory to judge the quick and the dead, Whose kingdom shall have no end.
And I believe in the Holy Spirit, the Lord and Giver of Life, Who proceedeth from the Father, Who with the Father and the Son together is worshipped and glorified, Who spake by the Prophets;
And I believe in One Holy Catholic and Apostolic Church.
I acknowledge one Baptism for the remission of sins.
I look for the Resurrection of the dead,
And the Life of the world to come, Amen.
PRIEST: Let us stand aright; let us stand with fear; let us attend, that we may offer the Holy Oblation in peace.
CHOIR: A mercy of peace, a sacrifice of praise.
PRIEST: The grace of our Lord Jesus Christ, and the love of God the Father, and the communion of the Holy Spirit, be with you all.
CHOIR: And with thy spirit.
PRIEST: Let us lift up our hearts.
CHOIR: We lift them up unto the Lord.
PRIEST: Let us give thanks unto the Lord.
CHOIR: It is meet and right to worship Father, Son and Holy Spirit: the Trinity, one in Essence, and undivided.
(The Priest turns toward the Altar and prays quietly:)
PRIEST: It is meet and right to hymn thee, to bless thee, to praise thee, to give thanks unto thee, and to worship thee in every place of thy dominion: for thou art God ineffable, inconceivable, invisible, incomprehensible, ever existing and eternally the same, thou and thine Only-begotten Son and thy Holy Spirit. Thou it was who didst bring us from non-existence into being, and when we had fallen away didst raise us up again, and didst not cease to do all things until thou hadst brought us back to heaven, and hadst endowed us with thy kingdom which is to come. For all these things we give thanks unto thee, and to thine Only-begotten Son, and thy Holy Spirit; for all things of which we know, and of which we know not, and for all the benefits bestowed upon us, both manifest and unseen. And we give thanks unto thee also for this ministry which thou dost vouchsafe to receive at our hands, even though there stand beside thee thousands of Archangels and ten thousands of Angels, the Cherubim and the Seraphim, six-winged, many eyed, soaring aloft, borne on their pinions,
PRIEST: (aloud) Singing the Triumphal Hymn, shouting, proclaiming, and saying:
CHOIR: Holy, Holy, Holy, Lord of Sabaoth; heaven and earth are full of thy glory; Hosanna in the highest: Blessed is he that cometh in the name of the Lord. Hosanna in the highest.
PRIEST: (quietly With these blessed Powers we also, O Master who lovest mankind, cry aloud and say: Holy art thou and all-holy, thou and thine Only-begotten Son, and thy Holy Spirit: holy art thou and all-holy, and magnificent is thy glory: Who hast so loved thy world as to give thine Only-begotten Son, that all who believe in Him should not perish, but have everlasting life; Who when he had come and had fulfilled all the dispensation for us, in the night in which he was betrayed,-- or rather, gave himself up for the life of the world,--took bread in his holy and pure and blameless hands; and when he had given thanks and blessed it, and hallowed it and broken it, he gave it to his holy Disciples and Apostles, saying:
PRIEST: (Aloud) Take, eat: this is my Body which is broken for you, for the remission of sins.
CHOIR: Amen.
PRIEST: (quietly) Likewise, after supper, he took the cup, saying:
(Aloud) Drink ye all of this: this is my Blood of the New Testament, which is shed for you and for any, for the remission of sins.
CHOIR: Amen.
PRIEST: (quietly) Having in remembrance, therefore, this saving commandment and all those things which have come to pass for us: the Cross, the Grave, the Resurrection on the third day, the Ascension into heaven, the Sitting at the right hand, and the second and glorious Coming:
(The Priest takes up the Diskarion and the Chalice and elevates them over the Antimins; he makes the sign of the Cross with them over the Antimins as he lowers them, saying:)
(Aloud) Thine own of thine own we offer unto thee, in behalf of all, and for all.
CHOIR: We praise thee, we bless thee, we give thanks unto thee, O Lord, and we pray unto thee, O our God.
(The Priest makes a low bow before the Altar, and continues with the Prayer of Consecration)
PRIEST: (Quietly) Again we offer unto thee this reasonable and unbloody service, and beseech thee and pray thee and supplicate thee: send down thy Holy Spirit upon us and upon these Gifts here spread forth:
(The Priest signs the Holy Bread with the sign of the cross, saying quietly:)
And make this bread the precious Body of thy Christ; Amen.
(The Priest makes the sign of the Cross over the Chalice, saying quietly:)
And that which is in this cup, the precious Blood of thy Christ; Amen.
(The Priest makes the sign of the Cross over both the holy Gifts, saying quietly:)
PRIEST: Changing them by thy Holy Spirit; Amen, Amen, Amen.
(The Priest makes a low bow before the Altar and continues the prayer quietly:)
That to those who shall partake thereof they may be unto cleansing of soul, unto the remission of sins, unto the communion of thy Holy Spirit, unto the fulfillment of the kingdom of Heaven, unto boldness toward thee, and not unto judgment nor unto condemnation.
PRIEST: (aloud) And grant us with one mouth and one heart to glorify and praise thine all-honorable and majestic name: of the Father, and of the Son, and of the Holy Spirit: now and ever, and unto ages of ages.
PRIEST: Asking for the unity of the Faith, and the communion of the Holy Spirit, let us commend ourselves and each other, and all our life unto Christ our God.
PRIEST: (quietly) Unto thee we commend our whole life and our hope, O Master who lovest mankind; and we beseech thee, and pray thee, and supplicate thee: make us worthy to partake of the heavenly and terrible Mysteries of this sacred and spiritual table, with a pure conscience: unto remission of sins, unto forgiveness of transgressions, unto communion of the Holy Spirit, unto boldness towards thee, and not unto judgment nor unto condemnation.
PRIEST: (aloud) And vouchsafe, O Lord, that with boldness and without condemnation we may dare to call upon thee, the heavenly God, as Father, and to say:
PEOPLE: Our Father, who art in heaven, hallowed be thy Name; thy kingdom come; thy will be done on earth as it is in heaven. Give us this day our daily bread; and forgive us our trespasses, as we forgive those who trespass against us; and lead us not into temptation, but deliver us from evil.
PRIEST: (aloud) For thine is the kingdom, and the power, and the glory, of the Father, and of the Son, and of the Holy Spirit: now and ever, and unto ages of ages.
CHOIR: Amen.
PRIEST: Peace be to all.
CHOIR: And to thy spirit.
PRIEST: Let us bow our heads unto the Lord.
CHOIR: To thee, O Lord.
PRIEST: (quietly) We give thanks unto thee, O King invisible, who by thy measureless power hast made all things, and in the multitude of thy mercy hast brought all things from nothing into being. Do thou thyself, O Master, look down from heaven upon those who have bowed their heads unto thee; for they have not bowed down unto flesh and blood, but to thee, the terrible God. Therefore, O Master, do thou thyself distribute these gifts here spread forth, unto all of us for good, according to the individual need of each: voyage with those who sail by sea and air; journey with those who travel by land; heal the sick, thou who art the physician of our souls and bodies:
PRIEST: (aloud) Through the grace and compassion and love toward man of thine Only-begotten Son, with whom thou art blessed, together with thine all-holy, and good, and life-giving Spirit: now and ever, and unto ages of ages.
PRIEST: (quietly) Look down, O Lord Jesus Christ our God, from thy holy dwelling-place, and from the throne of the glory of thy kingdom; and come to sanctify us, O thou who sittest on high with the Father, and art here invisibly present with us; and vouchsafe by thy mighty hand to impart unto us thine immaculate Body and precious Blood, and through us unto all the people.
CHOIR: One is Holy, One is Lord: Jesus Christ, to the glory of God the Father. Amen.
PRIEST: (aloud) For thou art our sanctification, and unto thee we ascribe glory: to the Father and to the Son and to the Holy Spirit: now and ever, and unto ages of ages.
PRIEST: O Lord, who blessest those who bless thee, and sanctifiest those who put their trust in thee: save thy people and bless thine inheritance; preserve the fullness of thy Church; sanctify those who love the beauty of thy House; glorify them in recompense by thy divine power, and forsake us not who hope on thee. Give peace to thy world, to thy Churches, to the priests, to all civil authorities, to our Armed Forces, and to all thy people: for every good and perfect gift is from above, and cometh down from thee, the Father of Lights, and unto thee we ascribe glory, thanksgiving, and worship: to the Father, and to the Son, and to the Holy Spirit: now and ever, and unto ages of ages.
CHOIR: Amen. Blessed be the name of the Lord, henceforth and forevermore. (Thrice).
PRIEST: Glory to thee, O Christ our God and our hope, glory to thee.
CHOIR: Glory to the Father, and to the Son, and to the Holy Spirit: both now and ever, and unto ages of ages. Amen. Lord, have mercy; Lord, have mercy; Lord, have mercy. Father, bless.