Regarding the leftover water of predatory animals, some scholars say that it is impure, citing the hadith of the two qullahs as evidence, while others say that the restriction to the two qullahs was made because

The questioner: Regarding the leftover water of predatory animals, O our Shaykh, the leftover water of predatory animals.

The Shaykh: Yes.

The questioner: Some scholars, O our Shaykh, say that it is impure, citing the hadith of the two qullahs as evidence, and some of them, O our Shaykh, say that the restriction to the two qullahs was made because the presence of predatory animals at water is a likely place for urine and feces to be found, and that they are impure. This is supported by the fact that the original ruling for substances is permissibility...

The Shaykh: The leftover water of forbidden animals.

The questioner: Yes.

The Shaykh: It is impure, but if it falls into water and changes one of its three properties, it becomes impure; otherwise, it does not. And peace be upon you.

The questioner: A good Shaykh, O our Shaykh, if you please.

The Shaykh: And that is all.
The student: And that is all.