Sahih al-Bukhari 696
Book 10: Call to Prayers (Adhaan) · Narrated by Anas bin Malik
Arabic
حَدَّثَنَا مُحَمَّدُ بْنُ أَبَانَ، حَدَّثَنَا غُنْدَرٌ، عَنْ شُعْبَةَ، عَنْ أَبِي التَّيَّاحِ، أَنَّهُ سَمِعَ أَنَسَ بْنَ مَالِكٍ، قَالَ النَّبِيُّ صلى الله عليه وسلم لأَبِي ذَرٍّ " اسْمَعْ وَأَطِعْ، وَلَوْ لِحَبَشِيٍّ كَأَنَّ رَأْسَهُ زَبِيبَةٌ ".
English translation
Narrated Anas bin Malik:The Prophet (ﷺ) said to Abu-Dhar, "Listen and obey (your chief) even if he is an Ethiopian with a head like a raisin
Reference: Sahih al-Bukhari 696, Book of Call to Prayers (Adhaan). English translation by Dr. Muhammad Muhsin Khan.