It was narrated that 'Aishah, may Allah be pleased with her, said:
"While I was menstruating, I would nibble meat from a bone, and the Messenger of Allah (ﷺ) would put his mouth where mine had been. And while I was menstruating, I would drink from a vessel and he would put his mouth where mine had been."
Arabic/English book reference: Vol. 1, Book 1, Hadith 70