Giovanni 5:13

For Jesus had conveyed himself away. — The second clause of this verse, as is shown by the marginal rendering, was not intended by our translators to convey the impression that a crowd had assembled round the scene of the miracle, and that to avoid this Jesus passed away from the place. In that case the man must have known who He was. Still the English does probably convey this meaning to most readers, and it would be better to give a freer rendering — For Jesus disappeared among the multitude which was in the place.

The presence of the multitude is not given as the reason for His going away, but as explaining the fact that He passed on with them after having spoken to the man, and was thus unknown to him.