"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."
Sunan an-Nasa'i Book 2, Hadith 17
← Previous Hadith "I poured some water for him for Wudu', and a cat came and drank from it, so he tilted the vessel for it to drink." Kabshah said: "He saw me looking at him and said: 'Are you surprised, O daughter of my brother?' I said: 'Yes.' He said: 'The Messenger of Allah (ﷺ) said: 'They are not impure, rather they are among the males and females (animals) who go around among you."

Sunan an-Nasa'i Book 2, Hadith 16 Next Hadith → "Men and women used to perform Wudu' together during the time of the Messenger of Allah (ﷺ)."

Sunan an-Nasa'i Book 2, Hadith 18