Kurayb, the freed slave of Sayyiduna Ibn Abbas (may Allah be pleased with them both), said: I heard Sayyidah Maymunah (may Allah be pleased with her) say: The Messenger of Allah (peace and blessings be upon him) would lie down with me while I was menstruating, and there would be a cloth between me and him (peace and blessings be upon him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحيض / 1491