Sahih Muslim , Hadith 380 ⓘ
Ibn Umar reported: The Messenger of Allah had two Mu'adhdhins, Bilal and 'Abdullah b. Umm Maktum, who (latter) was blind.
حَدَّثَنَا ابْنُ نُمَيْرٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ كَانَ لِرَسُولِ اللَّهِ صلى الله عليه وسلم مُؤَذِّنَانِ بِلاَلٌ وَابْنُ أُمِّ مَكْتُومٍ الأَعْمَى .
also referenced under: Book 4, Hadith 7 (In-Book) & Book 4, Hadith 741 (USC-MSA)
This hadith has been narrated on the authority of 'A'isha by another chain of transmitters.
وَحَدَّثَنَا ابْنُ نُمَيْرٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا عُبَيْدُ اللَّهِ، حَدَّثَنَا الْقَاسِمُ، عَنْ عَائِشَةَ، مِثْلَهُ .
also referenced under: Book 4, Hadith 8 (In-Book) & Book 4, Hadith 742 (USC-MSA)