Anas reported God’s Messenger as saying, “Listen and obey, even if an Abyssinian slave with a head like a raisin* is made governor over you.” Bukhari transmitted it. * This is said to refer to the head being small, or to the hair being crisp and curly, or short.

وَعَنْ أَنَسٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «اسْمَعُوا وَأَطِيعُوا وَإِنِ اسْتُعْمِلَ عَلَيْكُمْ عَبْدٌ حَبَشِيٌّ كَأَنَّ رَأْسَهُ زَبِيبَةٌ» . رَوَاهُ البُخَارِيّ