"The Messenger of Allah (ﷺ) was asked about water and how some animals and carnivorous beasts might drink from it. He said: 'If the water is more than two Qullahs, it will not become filthy.'"
Sunan an-Nasa'i Book 2, Hadith 4
← Previous Hadith "I passed by the Prophet (ﷺ) when he was performing Wudu' from the well of Buda'ah. I said: 'Are you performing Wudu' from it when garbage is thrown into it?' He said: 'Water is not made impure by anything.'"

Sunan an-Nasa'i Book 2, Hadith 3 Next Hadith → "Do not restrain him." When he had finished he called from a bucket (of water) and poured over it.

Sunan an-Nasa'i Book 2, Hadith 5