John Chrysostom — as excerpted in the Catena Aurea on Mark 14:12-16

“(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.”