“And he answered and said unto them, It is one of the twelve, that dippeth with me in the dish.”
Mark 14:20 — Greek Interlinear
Church Fathers on Mark 14:20
The Lord Who had foretold His Passion, prophesied also of the traitor, in order to give him room for repentance, that understanding that his thoughts were known, he might repent. Wherefore it is said, 'And in the evening he cometh with the twelve. And as they sat and did eat, Jesus said, Verily I say unto you, One of you which eateth with me shall betray me.'
But how could they eat reclining, when the law ordered that standing and upright they should eat the Passover? It is probable that they had first fulfilled the legal Passover, and had reclined, when He began to give them His own Passover.
The evening of the day points out the evening of the world; for the last, who are the first to receive the penny of eternal life, come about the eleventh hour. All the disciples then are touched by the Lord; so that there is amongst them the harmony of the harp, all the well attuned strings answer with accordant tone; for it goes on: 'And they began to be sorrowful, and to say unto Him one by one, Is it I?'