Language:
كتاب الصلاة
2  
The Book of the Prayer
(2)
Chapter: The Time Of The Fajr Prayer
(2)
باب وَقْتِ صَلاَةِ الْفَجْرِ ‏‏
Sunan Ibn Majah 669
It was narrated that 'Aishah said:
"The believing women used to perform the Subh prayer with the Prophet, then they would go back to their families and no one would recognize them," meaning of the darkness.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنِ الزُّهْرِيِّ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، قَالَتْ كُنَّ نِسَاءُ الْمُؤْمِنَاتِ يُصَلِّينَ مَعَ النَّبِيِّ ـ صلى الله عليه وسلم ـ صَلاَةَ الصُّبْحِ ثُمَّ يَرْجِعْنَ إِلَى أَهْلِهِنَّ فَلاَ يَعْرِفُهُنَّ أَحَدٌ ‏.‏ تَعْنِي مِنَ الْغَلَسِ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan Ibn Majah 669
In-book reference : Book 2, Hadith 3
English translation : Vol. 1, Book 2, Hadith 669