Origen
Catena Aurea · Lukasevangelium 19
And when he had thus spoken, he went before, ascending up to Jerusalem. And it came to pass, when he was come nigh to Bethphage and Bethany, at the mount called the mount of Olives, he sent two of his disciples, Saying, Go ye into the village over against you; in the which at your entering ye shall find a colt tied, whereon yet never man sat: loose him, and bring him hither. And if any man ask you, Why do ye loose him? thus shall ye say unto him, Because the Lord hath need of him. And they that were sent went their way, and found even as he had said unto them. And as they were loosing the colt, the owners thereof said unto them, Why loose ye the colt? And they said, The Lord hath need of him. And they brought him to Jesus: and they cast their garments upon the colt, and they set Jesus thereon. And as he went, they spread their clothes in the way.
(in Luc. 37.) The disciples next place their garments upon the ass, and cause the Saviour to sit thereon, inasmuch as they take upon themselves the word of God, and make it to rest upon the souls of their hearers. They divest themselves of their garments, and strew them in the way, for the clothing of the Apostles is their good works. And truly does the ass loosened by the disciples and carrying Jesus, walk upon the garments of the Apostles, when it imitates their doctrine. Which of us is so blessed, that Jesus should rest upon him?