Messenger of Allah ﷺ said, "Bilal pronounces the Adhan at night, so keep on eating and drinking (Suhur) till Ibn Um Maktum pronounces the Adhan." (Using translation from Bukhārī 620)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِنَّ ابْنَ أُمِّ مَكْتُومٍ يُؤَذِّنُ بِلَيْلٍ فَكُلُوا وَاشْرَبُوا حَتَّى يُؤَذِّنَ بِلَالٌ