صحيح مسلم

Jabir b. 'Abdullah said that a person among the Ansar declared his slave free after his death, as he had no other property. This news reached the Messenger of Allah (ﷺ) and he said: Who will buy him from me? And Nu'aim b. al-Nahham bought him for eight hundred dirhams and he handed them over to him, 'Amr (one of the narrators) said: I heard Jabir b. 'Abdullah as saying: He was a Coptic slave, and he died in the first year (of the Caliphate of 'Abdullah b. Zubair).