Sahih Muslim 514
Sahih Muslim · Book 4: The Book of Prayers · Lying In Front Of One Who Is Praying
'A'isha reported:
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ ، وَزُهَيْرُ بْنُ حَرْبٍ، قَالَ زُهَيْرٌ حَدَّثَنَا وَكِيعٌ ، حَدَّثَنَا طَلْحَةُ بْنُ يَحْيَى ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ ، قَالَ سَمِعْتُهُ عَنْ عَائِشَةَ ، قَالَتْ كَانَ النَّبِيُّ صلى الله عليه وسلم يُصَلِّي مِنَ اللَّيْلِ وَأَنَا إِلَى جَنْبِهِ وَأَنَا حَائِضٌ وَعَلَىَّ مِرْطٌ وَعَلَيْهِ بَعْضُهُ إِلَى جَنْبِهِ .
The Apostle of Allah (ﷺ) said prayer at night and I was by his side in a state of meanses and I had a sheet pulled over me a portion of which was on his side.