Bede the Venerable — as excerpted in the Catena Aurea on Mark 14:12-16

“(ubi sup.) Or else, the large upper-room is spiritually the Law, which comes forth from the narrowness of the letter, and in a lofty place, that is, in the lofty chamber of the soul, receives the Saviour. But it is designedly that the names both of the bearer of the water, and of the lord of the house, are omitted, to imply that power is given to all who wish to celebrate the true Passover, that is, to be embued with the sacraments of Christ, and to receive Him in the dwelling-place of their mind.”