Abu Dawud
General Behavior
Book Number: 036 / Hadith Number: 4771
Narated By Anas ibn Malik : A man who had the mark of yellowness on him came to the Apostle of Allah (pbuh). The apostle of Allah (pbuh) rarely mentioned anything of a man which he disliked before him. When he went out, he said: Would that you asked him to wash it from him.