The Book of the Times (of Prayer)
6/25. Chapter:
At-Taghlis (Praying Fajr While It Is Still Dark) While a Resident
Sunan an-Nasai
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ عَمْرَةَ، عَنْ عَائِشَةَ، قَالَتْ إِنْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم لَيُصَلِّي الصُّبْحَ فَيَنْصَرِفُ النِّسَاءُ مُتَلَفِّعَاتٍ بِمُرُوطِهِنَّ مَا يُعْرَفْنَ مِنَ الْغَلَسِ .
It was narrated that 'Aishah said: "When the Messenger of Allah (ﷺ) has prayed Subh, the women would depart, wrapped in their wrappers, unrecognizable because of the darkness."
Reference : Sunan an-Nasa'i 545In-book reference : Book 6, Hadith 52English translation : Vol. 1, Book 6, Hadith 546