Hilal bin Yasaf said: We were staying in the house of Suwaid bin Muqarrin. There was among us an old man who was hot-tempered. He had a slave-girl with him. He gave a slap on her face. I never saw Suwaid more angry than on that day. He said: there is no alternative for you except to free her. I was the seventh child in order of Muqarrin and we had only a female servant. The youngest of us gave a slap on her face. The prophet ﷺ commanded us to set her free.
Hadith Referenceسنن ابي داود / أبواب النوم / 5166
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم (1658),