And Salama ibn Shabib narrated to me, saying: al-Hasan ibn A‘yan narrated to us, saying: Ma‘qil narrated to us, from Zayd ibn Abi Unaysa, from Yahya ibn Husayn, from his grandmother Umm al-Husayn — he said: I heard her say: I performed the Farewell Pilgrimage with the Messenger of Allah, peace and blessings be upon him, and I saw him when he threw the Jamrat al-‘Aqaba and departed, while he was on his mount, with Bilal and Usama with him — one of them leading his mount, and the other raising his garment over the head of the Messenger of Allah, peace and blessings be upon him, to shield him from the sun. She said: Then the Messenger of Allah, peace and blessings be upon him, said many words, and then I heard him say: "If a slave with a mutilated limb is put in authority over you — I think she said: a black man — leading you by the Book of Allah, the Exalted, then listen to him and obey."