Sunan Abi Dawud — Oaths and Vows (Kitab Al-Aiman Wa Al-Nudhur) — Hadith No: 3283
Translation
Narrated Ash-Sharid ibn Suwayd ath-Thaqafi: Sharid's mother left a will to emancipate a believing slave on her behalf. So he came to the Prophet (ﷺ) and said: Messenger of Allah, my mother left a will that I should emancipate a believing slave for her, and I have a black Nubian slave-girl. He mentioned a tradition about the test of the girl. Abu Dawud said: Khalid b. 'Abd Allah narrated this tradition direct from the Prophet (ﷺ). He did not mention the name of al-Sharid