Muslim

Jabir bin '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 Apostle of Allah (ﷺ) and he said: Who will buy him from me? And Nu'aim bin al-Nahham bought him for eight hundred dirhams and he handed them over to him. 'Amr (one of the narrators) said: I heard Jabir bin 'Abdullah as saying: He was a Coptic slave, and he died in the first year (of the Caliphate of 'Abdullah bin Zubair).

Jabir is reported to have said: A person amongst the Ansar who had no other property declared a slave free after his death. Allah's Messenger (ﷺ) sold him, and Ibn al-Nahham bought him and he was a Coptic slave (who) died in the first year of the Caliphate of Ibn Zubair.

A hadith like this has been narrated on the authority of Jabir through another chain of transmitters.

Qutaiba ibn Sa'id narrated to us, al-Mughira—meaning al-Hizami—narrated to us, from Abd al-Majid ibn Suhayl, from Ata' ibn Abi Rabah, from Jabir ibn Abd Allah.
And Abdullah ibn Hashim narrated to me, Yahya—meaning ibn Sa'id—narrated to us, from al-Husayn ibn Dhakwan al-Mu'allim, he narrated to me from Ata' from Jabir.
And Abu Ghassan al-Misma'i narrated to me, Mu'adh narrated to us, my father narrated to me, from Matar, from Ata' ibn Abi Rabah, and Abu al-Zubayr and Amr ibn Dinar, that Jabir ibn Abd Allah narrated to them regarding the sale of the mudabbar.
All of them said: from the Prophet, peace and blessings be upon him, with the meaning of the hadith of Hammad and Ibn Uyaynah, from Amr, from Jabir.