It wasnarrated from Umm Husain that she heard the Messenger of Allah(ﷺ)say:
"Even if the one appointed over you is a mutilatedEthiopianslave whose nose and ears have been cut off, listen to himand obey,so long as he leads you according to the Book of Allah."
English reference: Vol. 4, Book 24, Hadith 2861
Arabic reference: Book 24, Hadith 2971