Sunan an-Nasa'i, Book 7, Hadith 644 (In-Book) ⓘ
It was narrated from Ibn 'Umar that the Messenger of Allah said: "Bilal calls the Adhan during the night, so eat and drink until Ibn Umm Maktum calls (the Adhan)"
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 " .
also referenced under: Volume 1, Book 7, Hadith 638 (DarusSalam)