The words, “and sought to slay Him,” should be omitted. They have been inserted in some MSS. to explain the first clause of John 5:18. For “He had done,” read He was doing. The word is in the imperfect tense, expressing continuance or custom. It is either that from this one instance they generalise a law of practice to justify their persecution, or that some of the earlier unrecorded miracles were also performed on the Sabbath. (Comp. Luke 6:1-11.)
Related Commentaries of John 5:16
John 5:16
16 And therefore did the Jews persecute Jesus, and sought to slay him, because he had done these things on the sabbath day.