Mishkat al-Masabih 3 Purification كتاب الطهارة 246

وَعَنْ مَيْمُونَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُصَلِّي فِي مِرْطٍ بَعْضُهُ عَلَيَّ وَبَعْضُهُ عَلَيْهِ وَأَنا حَائِض

Maimuna said, “God’s messenger used to pray in a woollen garment which was partly over him and partly over me while I was mentruat- ing.” (Bukhari and Muslim.)