Call to Prayers (Adhaan) 
Bukhari :: Book 1 :: Volume 11 :: Hadith 664
Narrated Anas bin Malik:
The Prophet said to Abu-Dhar, "Listen and obey (your chief) even if he is an Ethiopian with a head like a raisin."
Call to Prayers (Adhaan)
Bukhari :: Book 1 :: Volume 11 :: Hadith 664
Narrated Anas bin Malik:
The Prophet said to Abu-Dhar, "Listen and obey (your chief) even if he is an Ethiopian with a head like a raisin."