John the Apostle
John 5:15ESV·traditional attribution

The man went away and told the Jews that it was Jesus who had healed him.

John Calvin Reformed @genevareformer

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.

Matthew Henry Presbyterian @wholebiblehenry

This miraculous cure is not recorded by any other of the evangelists, who confine themselves mostly to the miracles wrought in Galilee, but John relates those wrought at Jerusalem. Concerning this observe, I. The time when this cure was wrought: it was at a feast of the Jews, that is, the passover, for that was the most celebrated feast.

Commenting on John 5:1-16

John Gill Reformed Baptist @doctorgill

The man departed,.... From Christ, and from the temple, not through displeasure, or as resenting what was said to him, but as highly delighted that he had found his kind benefactor and physician; and went either to Bethesda, where the miracle was wrought, and where a multitude of people were, and where he might expect to find some of the persons that had questioned him...