Harun bin 'Abdullah al-Hamal هارون بن عبد الله بن مروان الحمال · The Book of Water

"While I was menstruating, I would nibble meat from a bone and the Messenger of Allah (ﷺ) would put his mouth where mine has been. And while I was menstruating, I would drink from a vessel and he would put his mouth where mine had been."