Why then the law? It was added because of transgressions, till the descendant should come to whom the promise was made; and it was ordained by angels in the hand of a mediator.
All Commentaries on Galatians 3:19 Go To Galatians 3
John Chrysostom
AD 407
And it was ordained through Angels by the hand of a Mediator.
He either calls the priests Angels, or he declares that the Angels themselves ministered to the delivery of the Law. By Mediator here he means Christ, and shows that He was before it, and Himself the Giver of it.