It wasnarrated from Anas bin Malik that the Messenger of Allah (ﷺ)said:
"Listen and obey, even if the one appointed over you is anEthiopian slave with a head like a raisin." (FR)
English reference (FR): Vol. 4, Book 24, Hadith 2860 (FR)
Arabic reference (FR): Book 24, Hadith 2970 (FR)