(1) بَابُ مَا جَاءَ فِي إِجَازَةِ خَبَرِ الْوَاحِدِ الصَّدُوقِ فِي الأَذَانِ وَالصَّلاَةِ وَالصَّوْمِ وَالْفَرَائِضِ وَالأَحْكَامِ
Narrated `Abdullah bin `Umar:
The Prophet (ﷺ) said, "Bilal pronounces the Adhan at night so that you may eat and drink till Ibn Um Maktum pronounces the Adhan (for the Fajr prayer).
Reference: Sahih al-Bukhari 7248
In-book reference: Book 95, Hadith 3
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 91, Hadith 354