Ambrose of Milan
Catena Aurea · Lukasevangelium 22
Then came the day of unleavened bread, when the Passover must be killed. And he sent Peter and John, saying, Go and prepare us the Passover, that we may eat. And they said unto him, Where wilt thou that we prepare? And he said unto them, Behold, when ye are entered into the city, there shall a man meet you, bearing a pitcher of water; follow him into the house where he entereth in. And ye shall say unto the goodman of the house, The Master saith unto thee, Where is the guestchamber, where I shall eat the Passover with my disciples? And he shall shew you a large upper room furnished: there make ready. And they went, and found as he had said unto them: and they made ready the Passover.
First observe the greatness of His divine power. He is talking with His disciples, yet knows what will happen in another place. Next behold His condescension, in that He chooses not the person of the richor powerful, but seeks after the poor, and prefers a mean inn to the spacious palaces of nobles. Now the Lord was not ignorant of the name of the man whose mystery He knew, and that he would meet the disciples, but he is mentioned without a name, that he may be counted as ignoble.