Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bukhari:622Isḥāq > Abū Usāmah > ʿUbaydullāh > al-Qāsim b. Muḥammad > ʿĀʾishah > Nāfiʿ > Ibn ʿUmar

The Prophet ﷺ said, "Bilal pronounces the Adhan at night, so eat and drink (Suhur) till Ibn Um Maktum pronounces the Adhan."  

البخاري:٦٢٢حَدَّثَنَا إِسْحَاقُ قَالَ أَخْبَرَنَا أَبُو أُسَامَةَ قَالَ عُبَيْدُ اللَّهِ حَدَّثَنَا عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ عَنْ عَائِشَةَ وَعَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ ح وَحَدَّثَنِي يُوسُفُ بْنُ عِيسَى الْمَرْوَزِيُّ قَالَ حَدَّثَنَا الْفَضْلُ قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ عُمَرَ عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ عَنْ عَائِشَةَ

عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ إِنَّ بِلاَلاً يُؤَذِّنُ بِلَيْلٍ فَكُلُوا وَاشْرَبُوا حَتَّى يُؤَذِّنَ ابْنُ أُمِّ مَكْتُومٍ