Ubaidullah bin 'Umar al-Qawariri عبيد الله بن عمر القواريري · The Book of Purification

"I heard 'Aishah say: 'The Messenger of Allah (ﷺ) would hand me the vessel and I would drink from it, while 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.'"