Hilary of Poitiers
Catena Aurea · Johannesevangelium 5
Then answered Jesus and said unto them, Verily, verily, I say unto you, The Son can do nothing of himself, but what he seeth the Father do: for what things soever he doeth, these also doeth the Son likewise. For the Father loveth the Son, and sheweth him all things that himself doeth: and he will shew him greater works than these, that ye may marvel.
(vii. de Trin. c. 17) 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.