Catena Aurea on John 5:19–20: Hilary of Poitiers

He refers to the charge of violating the sabbath, brought against Him. My Father worketh hitherto, and I work; meaning that He had a precedent for claiming the right He did; and that what He did was in reality His Father’s doing, who acted in the Son. And to quiet the jealousy which had been raised, because by the use of His Father’s name He had made Himself equal with God, and to assert the excellency of His birth and nature, He says, Verily, verily, I say unto you, The Son can do nothing of Himself, but what He seeth the Father do.