Narrated `Aisha: Allah's Apostle used to offer the Fajr prayer when it was still dark and the believing women used to return (after finishing their prayer) and nobody could recognize them owing to darkness, or they could not recognize one another.
Hadith Referenceصحيح البخاري / كتاب الأذان (صفة الصلوة) / 872
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة