Abu Dawud Book 36, Hadith Number 4872.
Chapter : Not known.
Narated By Abdullah ibn Mas’ud : Zayd ibn Wahb said: A man was brought to Ibn Mas’ud. He was told: This is so and so, and wine was dropping from his beard. Abdullah thereupon said: We have been prohibited to seek out (faults). If anything becomes manifest to us, we shall seize it.