The Book of Water
كتاب المياه
Chapter 9: The Leftovers Of A Cat
"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."
Chapter 10: The Leftovers Of A Menstruating Woman
"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."
Chapter 12: The Prohibition Of The Leftovers Of A Woman's Wudu'
It was narrated from Al-Hakam bin 'Amr that the Messenger of Allah (ﷺ) forbade a man from performing Wudu' with the leftovers of a woman's (water for) Wudu'.
Chapter 14: How Much Water Is Sufficient For A Person To Use For Wudu' And Ghusl
It was narrated from 'Aishah that the Messenger of Allah (ﷺ) used to perform Ghusl with a Mudd and Ghusl with approximately a Sa'.