Afterward Jesus found him in the temple, and said unto him,
Behold, you are made whole: sin no more, lest a worse thing come unto you.
All Commentaries on John 5:14 Go To John 5
Irenaeus of Lyons
AD 202
This is in accordance with what the Lord said to the man who had been healed: "Behold, thou art made whole; sin no more, lest a worse thing come unto thee.".
And thus also He healed by a word all the others who were in a weakly condition because of sin; to whom also He said, "Behold, thou art made whole, sin no more, lest a worse thing come upon thee: "