Origen
Catena Aurea · Matthäusevangelium 26
Now when the even was come, he sat down with the twelve. And as they did eat, he said, Verily I say unto you, that one of yon shall betray me. And they were exceeding sorrowful, and began every one of them to say unto him, Lord, is it I? And he answered and said, He that dippeth his hand with me in the dish, the same shall betray me. The Son of man goeth as it is written of him: but woe unto that man by whom the Son of man is betrayed! it had been good for that man if he had not been born. Then Judas, which betrayed him, answered and said, Master, is it I? He said unto him, Thou hast said.
Or, He spoke generally, to prove the nature of each of their hearts, and to evince the wickedness of Judas, who would not believe in One who knew his heart. I suppose that at first he supposed that the thing was hid from Him, deeming Him man, which was of unbelief; but when he saw that his heart was known, he embraced the concealment offered by this general way of speaking, which was shamelesness. This also shews the goodness of the disciples, that they believed Christ’s words more than their own consciences, for they began each to say, Lord, is it I? For they knew by what Jesus had taught them that human nature is readily turned to evil, and is in continual struggle with the niters of the darkness of this world; (Eph. 6:12.) whence they ask as in fear, for by reason of our weakness the future is an object of dread to us. When the Lord saw the disciples thus alarmed for themselves, He pointed out the traitor by the mark of the prophetic declaration, He that hath eaten bread with me hath wantonly overthrown me. (Ps. 41:9.)