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Here's the epiklesis from the Divine Liturgy of St. James:

"Have mercy on us, Lord God, the Father, the Almighty. Have mercy on us, God our Saviour. Have mercy on us, O God, in accordance with your great mercy, and send forth upon these holy gifts, here set forth, your all-holy Spirit, (bowing) the Lord and giver of life, enthroned with you, God and Father, and your only-begotten Son, co-reigning, consubstantial and co-eternal, who spoke by the Law and the Prophets and by your New Covenant, who came down in the form of a dove upon our Lord Jesus Christ in the river Jordan, and rested upon him, who came down upon your holy Apostles in the form of fiery tongues in the upper room of holy and glorious Sion on the day of Pentecost. (Standing up) Your same all-holy Spirit, Lord, send down on us and on these gifts here set forth,

(aloud): that having come by his holy, good and glorious presence, he may sanctify this bread and make it the holy body of Christ,

People: Amen.

Priest: and this Cup the precious blood of Christ,

People: Amen.

Here is the Latin imprecise equivalent (with variations)

Pre-consecration epiclesis:
I: Bless and approve our offering; make it acceptable to you, an offering in spirit and in truth. Let it become for us the body and blood of Jesus Christ, your only Son, our Lord.
II: Let your Spirit come upon these gifts to make them holy,
so that they may become for us
the body and blood of our Lord, Jesus Christ.
III: And so, Father, we bring you these gifts.
We ask you to make them holy by the power of your Spirit, that they may become the body and blood of your Son, our Lord Jesus Christ, at whose command we celebrate this eucharist.
IV: Father, may this Holy Spirit sanctify these offerings. Let them become the body and blood of Jesus Christ our Lord as we celebrate the great mystery which he left us as an everlasting covenant.

Post-consecration epiclesis:
I: Look with favor on these offerings and accept them as once you accepted the gifts of your servant Abel, the sacrifice of Abraham, our father in faith, and the bread and wine offered by your priest Melchisedech. Almighty God, we pray that your angel may take this sacrifice to your altar in heaven. Then, as we receive from this altar the sacred body and blood of your Son, let us be filled with every grace and blessing.
II: May all of us who share in the body and blood of Christ be brought together in unity by the Holy Spirit.
III: Look with favour on your Church's offering, and see the Victim whose death has reconciled us to yourself. Grant that we, who are nourished by his body and blood, may be filled with his Holy Spirit, and become one body, one spirit in Christ.
IV: Lord, look upon this sacrifice which you have given to your Church; and by your Holy Spirit, gather all who share this one bread and one cup into the one body of Christ, a living sacrifice of praise.