Musnad Ahmad 26:393

Abu Sa’id, the freed slave of Banu Hashim, narrated to us, Zaidah narrated to us, ‘Asim narrated to us, from Zirr, from ‘Abdullah, who said: A black slave caught up with the Prophet, may Allah bless him and grant him peace, and then he died. He was brought to the Prophet, may Allah bless him and grant him peace, and he said: "Look, did he leave anything behind?" They said: "He left two dinars." He said: "Two brandings."