Bede the Venerable
Catena Aurea · Lukasevangelium 22
And he took bread, and gave thanks, and brake it, and gave unto them, saying, This is my body which is given for you: this do in remembrance of me. Likewise also the cup after supper, saying, This cup is the new testament in my blood, which is shed for you.
Because the bread strengthens, and the wine produces blood in the flesh, the former is ascribed to the Body of Christ, the latter to His Blood. But because both we ought to abide in Christ, and Christ in us, the wine of the Lord’s cup is mixed with water, for John bears witness, The people are many waters. (Rev. 17:15.)