Sayyiduna Abu Rimthah (may Allah be pleased with him) said: I entered upon the Messenger of Allah (peace and blessings be upon him) with my father. My father saw the mark that was on his (peace and blessings be upon him) back and said: "Allow me to treat this mark on your back, for I am a physician." He (peace and blessings be upon him) said: "You are gentle; the Physician is Allah." He said: The Messenger of Allah (peace and blessings be upon him) said to my father: "Who is this with you?" He said: "My son; I bear witness to it." The Prophet (peace and blessings be upon him) said: "Indeed, you will not bear the guilt of his crime, nor will he bear the guilt of yours." And he mentioned that he saw a trace of henna on the Messenger of Allah (peace and blessings be upon him).
Hadith Referenceالمعجم الكبير للطبراني / باب الياء / 18919