John the Apostle
John 5:13BSB·traditional attribution

But the man who was healed did not know who it was, for Jesus had slipped away while the crowd was there.

John Calvin Reformed @genevareformer

13. And he who had been cured knew not who he was. Christ certainly did not intend that the glory of so great a work should pass away, but he intended that it should become generally known before that he acknowledged himself to be the Author of it.

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

And he that was healed, wist not who he was,.... He had never seen, and perhaps had never heard of Christ before, and so knew him not; and besides, Christ gave him no opportunity of conversing with him, or so much as to ask him who he was: for Jesus had conveyed himself away; had slipped away, as soon as ever he had wrought the...