It is narrated from Sayyiduna Abu Huraira (may Allah be pleased with him) that a man came to the Messenger of Allah (peace and blessings be upon him) and said: O Messenger of Allah (peace and blessings be upon him)! We travel by sea and carry only a little water with us. If we use it for ablution, we will be left thirsty. Can we perform ablution with the water of the sea? The Prophet (peace and blessings be upon him) replied: "Its water is pure, and its dead (animals) are lawful."

It is narrated from Kabsha bint Ka'b that Sayyiduna Abu Qatadah Ansari (may Allah be pleased with him) came to her, so Kabsha placed a vessel of water for his ablution. Then a cat came to drink from it, so Sayyiduna Abu Qatadah (may Allah be pleased with him) tilted the vessel for the cat until it drank the water. Kabsha said: Sayyiduna Abu Qatadah (may Allah be pleased with him) saw that I was looking at him with astonishment, so Sayyiduna Abu Qatadah (may Allah be pleased with him) asked: Are you surprised, O my niece? I said: Yes. So Sayyiduna Abu Qatadah (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) said: "The cat is not impure; it is among those who go around among you frequently, by night and by day."

Imam Malik (may Allah have mercy on him) said: There is no harm in the leftover water of a cat, except if impurity is seen on its mouth.

Yahya bin Abdur Rahman narrates that Sayyiduna Umar bin Khattab (may Allah be pleased with him) went out with a group of riders, among whom was Sayyiduna Amr bin As (may Allah be pleased with him) as well. On the way, they came across a reservoir, so Sayyiduna Amr bin As (may Allah be pleased with him) asked the owner of the reservoir, "Do wild animals come to your reservoir to drink water?" Upon this, Sayyiduna Umar bin Khattab (may Allah be pleased with him) said, "O owner of the reservoir! Do not tell us, because sometimes the wild animals come before us and sometimes we come before the wild animals."

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) used to say that men and women used to perform ablution together during the time of the Messenger of Allah (peace and blessings be upon him).