Theophylact of Ohrid

But they would not have allowed this, if the Divine power had not been upon them, to compel them, especially, as they were country people and farmers, and yet allowed them to take away the colt. Or else, those who prevent them are the devils, who were weaker than the Apostles.

Catena Aurea by Aquinas ↗

Augustine of Hippo

Matthew says, an ass and a colt, the rest however do not mention the ass. Where then both may be the case, there is no disagreement, though one Evangelist mentions one thing, and a second mentions another; how much less should a question be raised, when one mentions one, and another mentions that same one and another. It goes on: 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 take it, that is, the colt.

Catena Aurea by Aquinas ↗

Bede

And some of those standing there said to them, "What are you doing untying the colt?" In the Gospel of Luke, it is written thus: "So those who were sent went and found it just as He had told them, a colt standing there. As they were untying the colt, its owners said to them, 'What are you untying the colt for?' " And quite appropriately. …

On the Gospel of Mark ↗