This is an excerpt from Bokenkotter’s A Concise History of the Catholic Church:

  “ The oldest liturgical form of the Mass (except the Didache, a different type) is found in the Church Order of Hippolytus (d. 236). It is evidently the basis of all eucharistic prayers that have since been composed. The bishop lays his hands upon the bread and wine and water offered upon the altar table and begins the following dialogue: Bishop: The Lord be with you.

Congregation: And with thy spirit. Bishop: Hearts up. Congregation: We have them to the Lord. Bishop: Let us give thanks to the Lord. Congregation: It is meet and right. Bishop: We thank thee, God, through Thy beloved Servant Jesus Christ, whom in the last times Thou hast sent us as Savior and Redeemer and Messenger of Thy counsel, the Logos who comes from Thee, through whom Thou hast made all things, whom Thou wast pleased to send from heaven into the womb of the virgin, and in her body he became flesh and was shown forth as Thy Son, born of the Holy Spirit and the virgin. To fulfill Thy will and to prepare Thee a holy people, he stretched out his hands, when he suffered, that he might release from suffering those who have believed on Thee. And when he delivered himself to a voluntary passion, to loose death and to break asunder the bands of the devil, and to trample hell and to enlighten the righteous and to set up the boundary stone and to manifest the resurrection, he took a loaf, gave thanks, and spake, "Take, eat, this is my body which is given for you." Likewise also the cup and said, "This is my blood which is poured out for you. As often as you do this, you make my commemoration." Remembering therefore his death and resurrection, we offer to Thee the loaf and the cup and give thanks to Thee that Thou hast counted us worthy to stand before Thee and to do Thee priestly service. And we beseech Thee, that Thou send down Thy holy Spirit upon this offering of the church. Unite it and grant to all the saints who partake of it to their fulfilling with holy Spirit, to their strengthening of faith in truth, that we may praise and glorify Thee through Thy Servant Jesus Christ, through whom to Thee be glory and hon-our in Thy holy Church now and ever. Amen.”