Abu Dawud Book 28, Hadith Number 4170.

Chapter : Use of khaluq by men.

Narated By Anas ibn Malik : A man came to the Apostle of Allah (PBUH) and he had the mark of yellowness (of saffron). The Prophet (peace be upon him rarely mentioned a thing which he disliked before a man. When he went away, he said: Would that you tell this man that he should wash this off him.