Recommendation to eat suhur until the adhan of Fajr
There were to callers of adhan for the Messenger of Allah ﷺ: Bilal and Ibn Umm Maktum, the blind. The Messenger of Allah ﷺ said: "Bilal announces the adhan at night, so eat and drink until Ibn Umm Maktum announces adhan." And he ˹the narrator˺ said: "The ˹period˺ between their ˹adhans˺ was not more than this that one climbing down ˹from the place of adhan˺ and the other one climbing up."
كَانَ لِرَسُولِ اللَّهِ ﷺ مُؤَذِّنَانِ بِلاَلٌ وَابْنُ أُمِّ مَكْتُومٍ الأَعْمَى فَقَالَ رَسُولُ اللَّهِ ﷺ إِنَّ بِلاَلاً يُؤَذِّنُ بِلَيْلٍ فَكُلُوا وَاشْرَبُوا حَتَّى يُؤَذِّنَ ابْنُ أُمِّ مَكْتُومٍ قَالَ وَلَمْ يَكُنْ بَيْنَهُمَا إِلاَّ أَنْ يَنْزِلَ هَذَا وَيَرْقَى هَذَا