Sayyidah Umm al-Husayn (may Allah be pleased with her) narrates: I saw the Messenger of Allah (peace and blessings be upon him) on the evening of Arafah standing on a camel. He (peace and blessings be upon him) had arranged his cloak like this, and had brought his right upper arm out. She said: I heard him (peace and blessings be upon him) saying: "O people, listen and obey, even if a mutilated Abyssinian slave is appointed as your ruler, provided he establishes among you the Book of Allah."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21843