(26) باب الْحَضِّ عَلَى طَاعَةِ الإِمَامِ
It was narrated that Yahya bin Husain said:
"I heard my grandmother say: 'I heard the Messenger of Allah say, during the Farewell Pilgrimage: If an Ethiopian slave is appointed over you who rules according to the Book of Allah, then listen to him and obey."'
Reference: Sunan an-Nasa'i 4192
In-book reference: Book 39, Hadith 44
English translation: Vol. 5, Book 39, Hadith 4197