Sunan an-Nasa'i 280
سنن النسائي#280SahihIt was narrated that 'Aishah said:"The Messenger of Allah (ﷺ) used to put his mouth on the place where I had drunk from, and he would drink from what was leftover by me, while I was menstruating
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 1:281