Ambrose of Milan
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.
For they were in the village, and the colt was tied with its mother, nor could it be loosed except by the command of the Lord. The apostle’s hand looses it. Such was the act, such the life, such the grace. Be such, that thou mayest be able to loose those that are bound. In the ass indeed Matthew represented the mother of error, but in the colt Luke has described the general character of the Gentile people. And rightly, whereon yet never man sat, for none before Christ called the nations of the Gentiles into the Church. But this people was tied and bound by the chains of iniquity, being subject to an unjust master, the servant of error, and could not claim to itself authority whom not nature but crime had made guilty. Since the Lord is spoken of, one master is recognised. O wretched bondage under a doubtful mastery! For he has many masters who has not one. Others bind that they may possess, Christ looses that he may keep, for He knew that gifts are more powerful than chains.