Sunan an-Nasa'i, Volume 1, Book 6, Hadith 547 (DarusSalam) ⓘ
It was narrated that 'Aishah said: "The women used to pray Subh with the Messenger of Allah, wrapped in their wrappers, then they would return, and no one would recognize them because of the darkness."
أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، قَالَتْ كُنَّ النِّسَاءُ يُصَلِّينَ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم الصُّبْحَ مُتَلَفِّعَاتٍ بِمُرُوطِهِنَّ فَيَرْجِعْنَ فَمَا يَعْرِفْهُنَّ أَحَدٌ مِنَ الْغَلَسِ .
also referenced under: Book 6, Hadith 551 (In-Book)