Pseudo-Jerome
Catena Aurea · Markusevangelium 11
And when they came nigh to Jerusalem, unto Bethphage and Bethany, at the mount of Olives, he sendeth forth two of his disciples, And saith unto them, Go your way into the village over against you: and as soon as ye be entered into it, ye shall find a colt tied, whereon never man sat; loose him, and bring him. And if any man say unto you, Why do ye this? say ye that the Lord hath need of him; and straightway he will send him hither. And they went their way, and found the colt tied by the door without in a place where two ways met; and they loose him. And certain of them that stood there said unto them, What do ye, loosing the colt? And they said unto them even as Jesus had commanded: and they let them go. And they brought the colt to Jesus, and cast their garments on him; and he sat upon him. And many spread their garments in the way: and others cut down branches off the trees, and strawed them in the way. And they that went before, and they that followed, cried, saying, Hosanna; Blessed is he that cometh in the name of the Lord: Blessed be the kingdom of our father David, that cometh in the name of the Lord: Hosanna in the highest.
The disciples of Christ are called two by two, and sent two by two, since charity implies more than one, as it is written, Woe to him that is alone. (Eccl. 4:10) Two persons lead the Israelites out of Egypt: two bring down the bunch of grapes from the Holy Land, that men in authority might ever join together activity and knowledge, and bring forward two commandments from the Two Tables, and be washed from two fountains, and carry the ark of the Lord on two poles, and know the Lord between the two Cherubim, and sing to Him with both mind and spirit.