Mark 14:12

(ubi sup.) Whilst Judas was plotting how to betray Him, the rest of the disciples were taking care of the preparation of the Passover: wherefore it is said, And the first day of unleavened bread, when they killed the Passover, his disciples said unto him, Where wilt thou that we go and prepare where thou mayest eat the Passover. (ubi sup.) Not our Passover, but in the meanwhile that of the Jews; but He did not only appoint ours, but Himself became our Passover. Why too did He eat it? Because He was made under the Law, to redeem them that were under the Law, (Gal. 4:4) and Himself give rest to the Law. And lest any one should say that He did away with it, because He could not fulfil its hard and difficult obedience, He first Himself fulfilled it, and then set it to rest.

(ubi sup.) He means by the first day of the Passover the fourteenth day of the first month, when they threw aside leaven, and were wont to sacrifice, that is, to kill the lamb at even. The Apostle explaining this says, Christ our Passover is sacrificed for us. (1 Cor. 5:7) For although He was crucified on the next day, that is, on the fifteenth moon, yet on the night when the lamb was offered up, He committed to His disciples the mysteries of His Body and Blood, which they were to celebrate, and was seized upon and bound by the Jews; thus He consecrated the beginning of His sacrifice, that is, of His Passion.

From the words of the disciples, Where wilt thou that we go? it seems evident that Christ had no dwelling-place, and that the disciples had no houses of their own; for if so, they would have taken Him thither.

But the unleavened bread which was eaten with bitterness, that is with bitter herbs, is our redemption, and the bitterness is the Passion of our Lord. For they say, Where wilt thou that we go? to show us that we should direct our steps according to the will of God.