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5. When any impurity is burnt, its smoke becomes pure. If it becomes hard and something is made out of it, then it will also be pure. As has been said of sal ammoniac, that it is made out
37. of impure smoke.
6. Sand and dust that is on of some impurity is pure on condition that the dampness of the impurity does not make them damp as well.
7. Gases that rise from impurities are pure. Worms that emerge from fruits are pure, but it is not proper to eat them if they are alive (or even dead). The same rule applies to the worms of wild figs, etc.
8. When edibles such as meat, sweetmeats, etc. get stale and begin to stink, they do not become impure. But when taking into consideration the harm that can be caused, it will not be proper to consume them.
9. Musk and the bag from which it is extracted is pure. The same applies to amber.
10. The saliva which comes out from a person's mouth while he is sleeping is pure.
11. An egg whose colour has changed is pure as long as it is not broken.
12. The skin of a snake is pure.
13. The water with which impure clothes were washed is also impure, irrespective of whether the water was used to wash the first, second or third time. However, the difference in these three waters is that if the water which was used to wash the first time falls on some clothing, this clothing will be purified after it is washed three times. If the water of the second time falls, then the clothing will be purified after it is washed twice. And if the water of the third time falls, then it will be purified after washing it once.
14. The water with which a dead person is given a bath is impure.
15. The skin of a snake is impure, i.e. the skin which is still attached to its body. The skin which it sheds is pure.
16. The saliva of a dead person is impure.
17. On one side of a cloth an excusable amount of impurity falls and seeps through the other side. The impurity that seeps through is also of an excusable amount. However, if both these excusable amounts are added together, they exceed the excusable limit. Even then it will be regarded as less and therefore excusable. But if the cloth is double-folded or two cloths have been placed together, and when added together they exceed the limit, it will not be excusable.
18. If one or two pieces of dung or excreta of a cow or goat fall into the milk while they are being milked, it is excusable as long as the dung or excreta is removed immediately. If it falls at some time other than the time of milking, the milk will become impure.
19. If a four to five year old boy who does not understand what wudhu is, makes wudhu; or an insane person makes wudhu, then the water will not be considered to be musta'mal (in other words that water can be used for wudhu by someone else).
20. Water that is used to wash clean clothes, utensils and other pure items can be used for wudhu and ghusl as long as its density does not change and as long as it is still referred to as water in normal conversation. But if there was some food or drink in the utensils, then using that water for wudhu or ghusl will only be permissible if at least two of the three qualities of water remain unchanged. If two qualities change, wudhu or ghusl will not be permissible.
21. It is makruh to drink used water, or to use it in cooking. wudhu and ghusl with such water is not permissible. However, it can be used to wash impurities.
22. The one who is in need of wudhu should not make wudhu with zam zam water. Nor should it be used by the one who has to have a bath. To wash impurities with it and to make istinja with it is makruh.