Matthew 26:18

Verse 18. Go into the city to such a man. That is, Jerusalem, called the city, by way of eminence. Luke says that the disciples whom he sent were Peter and John. The man to whom they were to go, it seems, he did not mention by name, but he told them that when they came into the city, a man would meet them bearing a pitcher of water. See Mark and Luke. Him they were to follow, and in the house which he entered they would find a room prepared. The name of the man was not mentioned. The house in which they were to keep the passover was not mentioned. The reason of this probably was, that Christ was desirous of concealing from Judas the place where they would keep the passover.