Sahih Muslim
The Book of Menstruation (Kitab Al-Haid)
Book Number: 003 / Hadith Number: 580
Kuraibthe freed slave of Ibn Abbas, reported: I heard it from Maimuna, the wife of the Apostle of Allah (way peace be upon him): The Messenger of Allah (may peace be upon him) used to lie with me when I menstruated, and there was a cloth between me and him.