Arabic (Original)
حَدَّثَنَا مُحَمَّدُ بْنُ بِشْرٍ حَدَّثَنَا عُبَيْدُ اللَّهِ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ قَالَ كَانَ لِلنَّبِيِّ مُؤَذِّنَانِ.
English Translation
Muhammad ibn Bishr told us, Ubaydullah told us, from Nafi', from Ibn Umar, who said: The Prophet had two muezzins.