Narrated `Abdullah bin `Umar: Allah's Apostle said, "Bilal pronounces the Adhan at night, so keep on eating and drinking (Suhur) till Ibn Um Maktum pronounces the Adhan."
Hadith ReferenceSahih Bukhari / The Book of Adhan / Hadith: 620
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة