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.
كُنَّ نِسَاءُ الْمُؤْمِنَاتِ يَشْهَدْنَ مَعَ رَسُولِ اللَّهِ ﷺ صَلاَةَ الْفَجْرِ مُتَلَفِّعَاتٍ بِمُرُوطِهِنَّ ثُمَّ يَنْقَلِبْنَ إِلَى بُيُوتِهِنَّ حِينَ يَقْضِينَ الصَّلاَةَ لاَ يَعْرِفُهُنَّ أَحَدٌ مِنَ الْغَلَسِ