Abu Dawud
Abu Dawud Book 017, Hadith Number 3414.
Hadith Section/Book: Abu Dawud Abu Dawud Book 17. Wages
Chapter : Not known.
Narated By Rafi' ibn Khadij : The Prophet (pbuh) said: The earnings of a cupper are impure, the price paid for a dog is impure, and the hire paid to a prostitute is impure.