Sunan an-Nasa'i — The Book of the Adhan (The Call to Prayer) — Hadith No: 637
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " إِنَّ بِلاَلاً يُؤَذِّنُ بِلَيْلٍ فَكُلُوا وَاشْرَبُوا حَتَّى يُنَادِيَ ابْنُ أُمِّ مَكْتُومٍ " .
Translation
It was narrated from Ibn 'Umar that the Messenger of Allah (S.A.W) said:"Bilal calls the Adhan during the night, so eat and drink until Ibn Umm Maktum calls (the Adhan)