(27) باب وَقْتِ الْفَجْرِ
Narrated `Aisha:
The believing women covered with their veiling sheets used to attend the Fajr prayer with Allah's Apostle, and after finishing the prayer they would return to their home and nobody could recognize them because of darkness.
Reference: Sahih al-Bukhari 578
In-book reference: Book 9, Hadith 54
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 10, Hadith 552