Musnad Abu Ya'la al-Mawsili 151:31

Abu Bakr ibn Abi Shaybah narrated to us, Abu Usamah narrated to us, from Za'idah, from 'Asim, 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. The Prophet, may Allah bless him and grant him peace, was informed about him, so he said: "Look to see if he left anything behind." They said: "Two dinars." The Prophet, may Allah bless him and grant him peace, said: "Two brandings."