John 5:10-18 ESV
So the Jews said to the man who had been healed, “It is the Sabbath, and it is not lawful for you to take up your bed.” But he answered them, “The man who healed me, that man said to me, ‘Take up your bed, and walk.’” They asked him, “Who is the man who said to you, ‘Take up your bed and walk’?” Now the man who had been healed did not know who it was, for Jesus had withdrawn, as there was a crowd in the place. Afterward Jesus found him in the temple and said to him, “See, you are well! Sin no more, that nothing worse may happen to you.” The man went away and told the Jews that it was Jesus who had healed him. And this was why the Jews were persecuting Jesus, because he was doing these things on the Sabbath. But Jesus answered them, “My Father is working until now, and I am working.”
This was why the Jews were seeking all the more to kill him, because not only was he breaking the Sabbath, but he was even calling God his own Father, making himself equal with God.
ESV: English Standard Version 2016