عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا أَنَّ نِسَاءً مِنَ الْمُؤْمِنَاتِ كُنَّ يُصَلِّينَ مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ الصُّبْحَ مُتَلَفِّعَاتٍ بِمُرُوطِهِنَّ، ثُمَّ يَرْجِعْنَ إِلَى أَهْلِهِنَّ وَمَا يَعْرِفُهُنَّ أَحَدٌ مِنَ الْغَلَسِ
Sayyidah Aisha (may Allah be pleased with her) narrates that believing women used to perform the Fajr prayer with the Messenger of Allah (peace and blessings be upon him), while they were wrapped in their cloaks, then they would return to their homes and no man could recognize them because of the darkness.