So far all I’ve found is this, from Saint John Chrysostom: “That saying, ‘This is my body’, once uttered, from that time to the present day, and even until Christ’s coming, makes the sacrifice complete at every table in the churches.”
Homily on the Betrayal of Judas (De proditione Judae hom. 1/2, 6)
This is from the 4th century. Is there anything perhaps earlier?
Perhaps, these thoughts can help.
The Catechism of the Catholic Church (CCC 1353) teaches that “In the
Institution Narrative, the power of the words and the action of Christ, and the power of the Holy Spirit, make sacramentally present under the species of bread and wine Christ’s body and blood …” The Catechism teaches us that (1) the words and action of Christ and (2) the action of the Holy Spirit are required for
transubstantiation to take place. It follows that in the absence of the
Words of Institution, an essential element is lacking and therefore, no transubstantiation occurs. But if all the essential elements are there, then transubstantiation occurs.
Is there scriptural basis for this teaching? Yes, there is. We start with the Lord’s
anamnesis command: “
Do this in memory of Me” (Lk 22:19; 1Cor11:23, 25). "
Do this" is an expression found in the Old Testament and Jewish liturgy which frequently refers to the
repetition of a rite. Note that the expression is an imperative (not a request); it is a command that an action be done. So we ask, in Christ’s
“Do this”, to what does the word
“this” refer?
A textual analysis of Lk 22:19 (parallel 1Cor 11:23, 25) can be made to show that Jesus’ imperative to
do this refers to both action and words of Jesus at the Last Supper with reference to the bread and wine. Referring to Jesus, Luke writes in Lk 22:19: "The he
took a loaf of bread, and when he
had given thanks, he
broke it and
gave it to them,
saying, "This is my body, which is given for you. Do this in remembrance of me. Lk 22:19 describes the
Rite of Breaking Bread. In 1Cor 11:23, 25, the Pauline tradition repeats Jesus’ command to '
Do this’ in the
Rite of Blessing the Cup.
Thus, in the Lord’s command to
Do this, the word '
this’ refers to the
Rite of Breaking Bread and the Rite of Blessing the Cup. Both rites include the action and words of Jesus with respect to the bread and wine. Jesus was commanding the apostles to repeat His action and His words. If one element of the rite is missing, such as the
Words of Institution, the rite is not complete; the Lord’s imperative is not complied with, and thus, no transubstantiation takes place. But if the Lord’s imperative is complied with, then transubstantiation takes place. (to be continued)