Sahih Muslim Book - 13, Hadith - 2538

حَدَّثَنَا ابْنُ نُمَيْرٍ حَدَّثَنَا أَبِى حَدَّثَنَا عُبَيْدُ اللَّهِ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ - رضى الله عنهما - قَالَ كَانَ لِرَسُولِ اللَّهِ -صلى الله عليه وسلم- مُؤَذِّنَانِ بِلاَلٌ وَابْنُ أُمِّ مَكْتُومٍ الأَعْمَى فَقَالَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- « إِنَّ بِلاَلاً يُؤَذِّنُ بِلَيْلٍ فَكُلُوا وَاشْرَبُوا حَتَّى يُؤَذِّنَ ابْنُ أُمِّ مَكْتُومٍ ». قَالَ وَلَمْ يَكُنْ بَيْنَهُمَا إِلاَّ أَنْ يَنْزِلَ هَذَا وَيَرْقَى هَذَا.

It was narrated that ‘Ibn Umar [may Allah be pleased with them] said: “The Messenger of Allah had two Mu’adhdhin, Bilal and Ibn Umm Maktum, the blind man. The Messenger of Allah (SAW) said: ‘Bilal calls the Adhan at night, so eat and drink until Ibn Umm Maktum calls the Adhan.” And there was no more between them than the time it took for one to climb down and the other to climb up.