Musnad Abu Ya'la al-Mawsili 150:298

Musa narrated to us, Yahya narrated to us, from Jabir ibn al-Subh, he said: I heard Khallas al-Hajari saying: I heard Aisha (may Allah be pleased with her) saying: I and the Messenger of Allah (peace and blessings of Allah be upon him) used to spend the night under the same garment while I was menstruating. If anything touched it, he would wash that spot and not go beyond it, then he would pray in it.