Sharih bin Hani' al-Harithi شريح بن هانئ · The Book of Menstruation and Istihadah

"The Messenger of Allah (ﷺ) would put his mouth on the place from which I had drunk, and he would drink from my leftovers when I was menstruating."

"I heard 'Aishah say: 'The Messenger of Allah (ﷺ) would give me the vessel and I would drink from it, when I was menstruating, then I would give it to him and he would look for the place where I had put my mouth and put that to his mouth.'"

"I would drink when I was menstruating, then I would hand it to the Prophet (ﷺ), and he would put his mouth where mine had been and drink. And I would nibble at a bone on which some bits of meat were left when I was menstruating, then I would give it to the Prophet (ﷺ) and he would put his mouth where my mouth had been."