(28) باب مَا جَاءَ فِي طَاعَةِ الإِمَامِ
Narrated Umm Al-Husain Al-Ahmasiyyah:
I heard the Messenger of Allah (ﷺ) delivering Khutbah during the farewell Hajj, and he was wearing a Burd which he had wrapped from under his armpit." She said: "I was look at muscle of his upper arm quivering and I heard him saying: O you people! Have Taqwa of Allah. If a mutilated Ethiopian slave is put in command over you, then listen to him and obey him, as long as he upholds the Book of Allah among you.'"[Abu 'Eisa said:] There are narrations on this topic from Abu Hurairah and 'Irbad bin Sariyah. This Hadith is Hasan Sahih, it has been reported through other routes from Umm Husain.
Reference: Jami` at-Tirmidhi 1706
In-book reference: Book 23, Hadith 38
English translation: Vol. 3, Book 21, Hadith 1706