John 5:17

My Father worketh hitherto and I work--The "I" is emphatic; "The creative and conservative activity of My Father has known no sabbath-cessation from the beginning until now, and that is the law of My working."

We have here Christ's discourse upon occasion of his being accused as a sabbath-breaker, and it seems to be his vindication of himself before the sanhedrim, when he was arraigned before them: whether on the same day, or two or three days after, does not appear; probably the same day. Observe, I. The doctrine laid down, by which he justified what he did on the sabbath day (Joh 5:17): He answered them. This supposes that he had something laid to his charge: or what they suggested one to another, when they sought to slay him (Joh 5:16), he knew, and gave this reply to, My Father worketh hitherto, and I work. At other times, in answer to the like charge, he had pleaded the example of David's eating the show-bread, of the priests' slaying the sacrifices, and of the people's watering their cattle on the sabbath day; but here he goes higher and alleges the example of his Father and his divine authority; waiving all other pleas, he insists upon that which was instar omnium - equivalent to the whole, and abides by it, which he had mentioned, Mat 12:8. The Son of man is Lord even of the sabbath day; but he here enlarges on it. 1. He pleads that he was the Son of God, plainly intimated in his calling God his Father; and, if so, his holiness was unquestionable and his sovereignty incontestable; and he might make what alterations he pleased of the divine law. Surely they will reverence the Son, the heir of all things. 2. That he was a worker together with God. (1.) My Father worketh hitherto. The example of God's resting on the seventh day from all his work is, in the fourth commandment, made the ground of our observing it as a sabbath or day of rest. Now God rested only from such work as he had done the six days before; otherwise he worketh hitherto, he is every day working, sabbat…

5:17 My Father is always working, and so am I: Although work was prohibited on the Sabbath, even rabbis agreed that God worked on the Sabbath in giving life (births) and in taking life (deaths). The heart of Jesus’ defense was to compare himself to God; the Jewish leaders objected to this claim of divine privilege.