سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 638
The Book of the Adhan (The Call to Prayer)
Two Mu'adhdhins In One Masjid
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنِ ابْنِ شِهَابٍ، عَنْ سَالِمٍ، عَنْ أَبِيهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ إِنَّ بِلاَلاً يُؤَذِّنُ بِلَيْلٍ فَكُلُوا وَاشْرَبُوا حَتَّى تَسْمَعُوا تَأْذِينَ ابْنِ أُمِّ مَكْتُومٍ .
It was narrated from Salim, from his father, that the Prophet (ﷺ) said: "Bilal calls the Adhan during the night, so eat and drink until you hear Ibn Umm Maktoom calling the Adhan."
Sunan an-Nasa'i, 638Sahih (Darussalam)