John 5:13

But he who was healed, &c. The man knew not the name of Jesus, nor whither He had gone, nor indeed who He was, for he had never seen Him before.

Departed. Euthymius gives the reason. "As soon as He had healed the man, He withdrew because of the crowd, partly to avoid the praise of the just, and partly to take away occasion for the envy of the unjust." S. Chrysostom gives another reason: That the man's testimony in the absence of Jesus might be less liable to suspicion. For if he who was healed had praised Christ to the Jews before His face, he might have seemed to have done it out of favour. But now that he praised Him in His absence, it is evident that he did so from the love of the truth.