Narrated Mahmud bin Ar-rabi' Al-Ansari: that he remembered Allah's Apostle and he also remembered a mouthful of water which he had thrown on his face, after taking it from a well that was in their house.
Hadith ReferenceSahih Bukhari / The Book of Salat-Ut-Tahajjud (Night Prayer) / Hadith: 1185
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة