John Chrysostom — as excerpted in the Catena Aurea on Matthew 21:1-9

“And think not this a little thing which was now done, for who was it that wrought with the owners of the beasts that they refused not, but yielded them? By this also He instructs His disciples that He could have restrained the Jews, but would not; and further teaches them that they should grant whatever is asked of them; for if they who knew not Christ, now granted this, much more it becomes His disciples to give unto all. For that which is said, But will straightway let them go,”