Sayyidah Maymunah bint al-Harith (may Allah be pleased with her), the wife of the Prophet (peace and blessings be upon him), said: "The Messenger of Allah (peace and blessings be upon him) would pray while I was opposite him, and I was menstruating, and sometimes his garment would touch me when he prostrated."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20372