the Prophet said: "Wash the vessel the dog has drunk from seven times: the first or the last of them with dirt. And when the cat drinks out of it, wash it once."
Jami` at-Tirmidhi Book 1, Hadith 91
← Previous Hadith "A man greeted the Prophet (with Salam), and he was urinating, so he did not respond to him."

Jami` at-Tirmidhi Book 1, Hadith 90 Next Hadith → "Kabshah bint Ka'b bin Malik - she was (married) with Ibn Abi Qatadah - narrated "That Abu Qatadah visited her, 'So I poured water for him to use for Wudu.' She said: 'A cat came to drink, so he lowered he container until it drank.' Kabshah said: 'So he saw me looking at it and said, "O my niece! Are you surprised at that?" So I said yes. He said: "Indeed Allah's Messenger said 'It is not impure, it is only one of those roam around among you.'"

Jami` at-Tirmidhi Book 1, Hadith 92