It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) and I used to bathe from a single vessel while we were both in a state of major ritual impurity. While in i'tikaf, he (peace and blessings be upon him) would put his head out of the mosque and I, though menstruating, would wash his (peace and blessings be upon him) head. He would order me and I would tie on a waist-wrap, then he (peace and blessings be upon him) would embrace me (lie beside me) while I was menstruating.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 907