Sahih Muslim , Book 20, Hadith 4529 (USC-MSA) ⓘ
This hadith has been transmitted on the authority of Shu'ba with the same chain of transmitters, and he said: "An Abyssinian slave."
وَحَدَّثَنَاهُ ابْنُ بَشَّارٍ، حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، وَعَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ، عَنْ شُعْبَةَ، بِهَذَا الإِسْنَادِ وَقَالَ عَبْدًا حَبَشِيًّا .
also referenced under: Book 33, Hadith 57 (In-Book) & Hadith 1838 (Reference)