حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا وَكِيعُ بْنُ الْجَرَّاحِ، عَنْ شُعْبَةَ، عَنْ يَحْيَى بْنِ الْحُصَيْنِ، عَنْ جَدَّتِهِ أُمِّ الْحُصَيْنِ، قَالَتْ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ ‏"‏ إِنْ أُمِّرَ عَلَيْكُمْ عَبْدٌ حَبَشِيٌّ مُجَدَّعٌ فَاسْمَعُوا لَهُ وَأَطِيعُوا مَا قَادَكُمْ بِكِتَابِ اللَّهِ ‏"‏ ‏.‏

It wasnarrated from Umm Husain that she heard the Messenger of Allah(PBUH)say: “Even if the one appointed over you is a mutilatedEthiopianslave whose nose and ears have been cut off, listen to himand obey,so long as he leads you according to the Book of Allah.” Translation Not Available

Book Ref: Sunan Ibn Majah Book 24 Hadith 2861
Web Ref:  Sunan Ibn Majah Vol 4 Book 24 Hadith 2861