Sunan Ibn Majah, Book 24, Hadith 2970 (In-Book) ⓘ
It was narrated from Anas bin Malik that the Messenger of Allah said: “Listen and obey, even if the one appointed over you is an Ethiopian slave with a head like a raisin.”
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، وَأَبُو بِشْرٍ بَكْرُ بْنُ خَلَفٍ قَالاَ حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، حَدَّثَنَا شُعْبَةُ، حَدَّثَنِي أَبُو التَّيَّاحِ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " اسْمَعُوا وَأَطِيعُوا وَإِنِ اسْتُعْمِلَ عَلَيْكُمْ عَبْدٌ حَبَشِيٌّ كَأَنَّ رَأْسَهُ زَبِيبَةٌ " .
also referenced under: Hadith 2860 (Reference) & Volume 4, Book 24, Hadith 2860 (DarusSalam)