John Calvin on John 5:15-16

15. The man went away Nothing was farther from his intention than to make Christ an object of their hatred, and nothing was farther from his expectation than that they would rage so furiously against Christ. His intention, therefore, was pious; for he wished to render to his Physician the honor which was justly due to him. The Jews, on the other hand, show their venom, not only in accusing Christ of having violated the Sabbath, but in breaking out into extreme cruelty.

John 5:17-19

17. But Jesus answered them, My Father worketh hitherto, and I work. 18. For this reason, therefore, the Jews sought the more to kill him, because he not only broke the Sabbath, but likewise called God his Father, making himself equal with God. 19. Jesus then answered, and said to them, Verily, verily, I say to you, The Son cannot do any thing of himself but what he hath seen the Father do; for whatsoever things he doeth, those also doeth the Son likewise.