عَنْ عَبْدِ اللَّهِ بْنِ شَدَّادٍ قَالَ: سَمِعْتُ مَيْمُونَةَ زَوْجِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ تَقُولُ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُومُ فَيُصَلِّي مِنَ اللَّيْلِ وَأَنَا نَائِمَةٌ إِلَى جَنْبِهِ فَإِذَا سَجَدَ أَصَابَنِي ثِيَابُهُ وَأَنَا حَائِضٌ
It is narrated from the wife of the Messenger, Sayyida Maymunah (may Allah be pleased with her), she says: The Messenger of Allah (peace and blessings be upon him) would wake up at night and perform prayer, and I would be lying beside him. When he (peace and blessings be upon him) would go into prostration, his garment would touch me, while I was menstruating.