Messenger of Allah ﷺ used to offer the Fajr prayer and some believing women covered with their veiling sheets used to attend the Fajr prayer with him and then they would return to their homes unrecognized .  

لَقَدْ كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي الْفَجْرَ فَيَشْهَدُ مَعَهُ نِسَاءٌ مِنَ الْمُؤْمِنَاتِ مُتَلَفِّعَاتٍ فِي مُرُوطِهِنَّ ثُمَّ يَرْجِعْنَ إِلَى بُيُوتِهِنَّ مَا يَعْرِفُهُنَّ أَحَدٌ