عَنْ مَيْمُونَةَ زَوْجِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَتْ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يُصَلِّي عَلَى الْخُمْرَةِ فَيَسْجُدُ فَيُصِيبُنِي ثَوْبُهُ وَأَنَا إِلَى جَنْبِهِ وَأَنَا حَائِضٌ
The wife of the Messenger, Sayyida Maymunah (may Allah be pleased with her), says that the Messenger of Allah (peace and blessings be upon him and his family) used to pray on a sheet, while I would be beside him in a state of menstruation. When he prostrated, his garment would keep touching me.