Sahih Bukhari
Sahih Bukhari Volume 001, Book 012, Hadith Number 826.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 12. Charecteristics Of Prayer
Narated By 'Aisha : When Allah's Apostle finished the Fajr prayer, the women would leave covered in their sheets and were not recognized owing to the darkness.