Language:
كتاب الأذان
10  
Call to Prayers (Adhaan)
(165)
Chapter: Returning of the women immediately after the Fajr prayer and their staying in the mosque for a short period only
(165)
باب سُرْعَةِ انْصِرَافِ النِّسَاءِ مِنَ الصُّبْحِ، وَقِلَّةِ مَقَامِهِنَّ فِي الْمَسْجِدِ
Sahih al-Bukhari 872

Narrated `Aisha:

Allah's Messenger (ﷺ) 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.

حَدَّثَنَا يَحْيَى بْنُ مُوسَى، حَدَّثَنَا سَعِيدُ بْنُ مَنْصُورٍ، حَدَّثَنَا فُلَيْحٌ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْقَاسِمِ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، رضى الله عنها أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يُصَلِّي الصُّبْحَ بِغَلَسٍ فَيَنْصَرِفْنَ نِسَاءُ الْمُؤْمِنِينَ، لاَ يُعْرَفْنَ مِنَ الْغَلَسِ، أَوْ لاَ يَعْرِفُ بَعْضُهُنَّ بَعْضًا‏.‏
Reference : Sahih al-Bukhari 872
In-book reference : Book 10, Hadith 263
USC-MSA web (English) reference : Vol. 1, Book 12, Hadith 831
  (deprecated numbering scheme)