(19) باب إِذَا أَصَابَ ثَوْبُ الْمُصَلِّي امْرَأَتَهُ إِذَا سَجَدَ
Narrates `Abdullah bin Shaddad:
Maimuna said, "Allah's Messenger (ﷺ) was praying while I was in my menses, sitting beside him and sometimes his clothes would touch me during his prostration." Maimuna added, "He prayed on a Khumra (a small mat sufficient just for the face and the hands while prostrating during prayers).
Reference: Sahih al-Bukhari 379
In-book reference: Book 8, Hadith 31
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 8, Hadith 376