The Prophet (ﷺ) 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.
Sunan Abi Dawud Book 40, Hadith 109
← Previous Hadith Habib ibn Salim said: A man called AbdurRahman ibn Hunayn had intercourse with his wife's slave-girl. The matter was brought to an-Nu'man ibn Bashir who was the Governor of Kufah. He said: I shall decide between you in accordance with the decision of the Messenger of Allah (ﷺ). If she made her lawful for you, I shall flog you one hundred lashes. If she did not make her lawful for you, I shall stone you to death. So they found that she had made her lawful for him. He, therefore, flogged him one hundred lashes.

Qatadah said: I wrote to Habib b. Salim; so he wrote this (tradition) to me.

Sunan Abi Dawud Book 40, Hadith 108 Next Hadith → The Messenger of Allah (ﷺ) made a decision about a man who had intercourse with his wife's slave-girl as follows. If he forced her, she is free, and he shall give her mistress a slave-girl similar to her; if she asked him to have intercourse voluntarily, she will belong to him, and he shall give her mistress a slave-girl similar to her.

Abu Dawud said: This tradition has been transmitted by Yunus b. 'Ubaid, 'Amr b. Dinar, Mansur b. Zadhan and Salam from al-Hasan to the same effect. But yunus and Mansur did not mention Qabisah.

Sunan Abi Dawud Book 40, Hadith 110