Section: Regarding the wall gecko (wazagh) (19), there are two opinions:
One of them is that it does not become impure upon death, because it has no flowing blood, making it similar to a scorpion. Furthermore, if there is doubt regarding its impurity, the water remains upon its original state of purity.
The second is that it does become impure, based on what was narrated from Ali (may Allah be pleased with him), who used to say: "If a wall gecko or a mouse dies in a jar, pour out what is in it; and if it dies in a well, then drain it until it overcomes you."
Section: If an animal dies in water and it is not known whether it becomes impure upon death or not, then the water is pure, because the original state is its purity, and the impurity is a matter of doubt; therefore, one does not abandon certainty for doubt.
The same ruling applies if an animal drinks from it and there is doubt regarding the purity or impurity of its leftover water (su'r), due to what we have already mentioned.
7 - Issue: He said: "And one may not perform ablution with the leftover water of any beast whose meat is not consumed, except for the cat (1) and those smaller than it in creation."
Su'r (leftover water) is the remains of drinking. Animals are of two types: impure and pure. The impure category is of two types:
One of them is what is impure according to a single narration, which is the dog, the swine, and whatever is produced from them or from one of them. This is impure in its essence, its leftover water, and everything that exits from it. This has been narrated from Urwa (2), and it is the view of al-Shafi'i and Abu Ubayd, and it is the statement of Abu Hanifa specifically regarding the leftover water.
Malik, al-Awza'i, and Dawud (3) said: Their leftover water is pure; one may perform ablution with it and drink it, and if they lap from food, eating it does not become forbidden.
Al-Zuhri said: One may perform ablution with it if one finds nothing else.
(19) The wall gecko: It is what is known as the common house gecko (sam abras). (1) The cat: The domestic cat. (2) Abu Abd Allah Urwa ibn al-Zubayr ibn al-Awwam, one of the jurists (fuqaha) of the Successors (tabi'in) in Medina; he died in the year 94 AH. Tabaqat al-Fuqaha by al-Shirazi, 58, 59. (3) Abu Sulayman Dawud ibn Ali ibn Khalaf al-Asbahani al-Zahiri, the jurist and ascetic; the leadership of scholarship in Baghdad culminated in him, and he died there in the year 290 AH. Tabaqat al-Fuqaha by al-Shirazi, 92.