Musannaf Ibn Abi Shaybah 39806 — Reports on the death of the Prophet

It is narrated from Sa'id bin al-Musayyib that, of all the people, those who were entrusted with the burial of the Prophet (peace and blessings be upon him) and with lowering him into the grave were four people: Sayyiduna Ali (may Allah be pleased with him), Sayyiduna al-Abbas (may Allah be pleased with him), Sayyiduna al-Fadl (may Allah be pleased with him), and Salih, the freed slave of the Prophet (peace and blessings be upon him). They made a side-niche (lahd) for him (peace and blessings be upon him) and set unbaked bricks in place over him (peace and blessings be upon him).