Aisha bint Abi Bakr · The Book of Water

"A man asked the prophet (ﷺ): 'O Messenger of Allah, we travel by sea and we take a little water with us, but if we use it for Wudu', we will go thirsty. Can we perform Wudu' with seawater?' The Messenger of Allah (ﷺ) said: 'Its water is a means of purification and its dead meat is permissible.'"

"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."

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'.

"I heard Anas bin Malik say: 'The Messenger of Allah (ﷺ) used to perform Wudu' with a Makkuk (cup) and Ghusl with five Makkuks (cups).'"

It was narrated from 'Aishah that the Messenger of Allah (ﷺ) used to perform Ghusl with a Mudd and Ghusl with approximately a Sa'.