Abu Dawud
Prescribed Punishments
Book Number: 033 / Hadith Number: 4444
Narated By An-Nu'man ibn Bashir : The Prophet (pbuh) said: about a man who had (unlawful) intercourse with his wife's slave girl: If she made her lawful for him, he will be flogged one hundred lashes; if she did not make her lawful for him, I shall stone him.