First and Second Washings
Question :

If something is made tahir from urine using under-kurr water, is the water that flows away from it najis or tahir in the first and second washings?

Answer :

The water that flows from the object being washed will be najis, whether it is the first washing or the second.

Purifying from Urine
Question :

When purifying something from urine, is it necessary to pour water twice with under-kurr water? Would it be sufficient to pour water once for a longer period continuously?

Answer :

One must repeat the washing in order to purify a place from urine. It is not sufficient to wash once for an elongated time.

Under-Kurr Water
Question :

What is the ruling of the under-Kurr water which is poured over a najis thing to wash it after the essential najasah has been removed?

Answer :

It is considered to be najis.

Using Under-Kurr Water
Question :

When purifying an object which has become najis due to something other than urine and under-kurr water is used, such as from a pitcher, is it sufficient to just pour water on the object once?

Answer :

Yes, it is sufficient to pour that water once to make it tahir, and it is necessary to pour the water twice if it became najis with urine.

Purifying with Mop
Question :

I live in a high-rise building. A drop of semen fell on the floor in my apartment. It is not possible to wash the floor with running water, because it is not a bathroom, but it is a bedroom. I washed the semen using a mop, and then I washed the mop under running water and then washed the place again, and I did this several times. Has my floor become tahir? Or is my mop becoming najis every time?

Answer :

The taharah is not established by this; therefore, when you wipe the najis part of your floor with the mop, it becomes najis every time you do that, and the najasah is spread to surrounding areas.
One should pour the water on the najis part of the floor, and then collect the water with a cloth or mop, and the place will become tahir.

Muddy Water
Question :

Is muddy water or water containing sugar and salt sufficient for making oneself tahir from najasah?

Answer :

It is possible to use water to make things tahir, if the percentage of salt, sugar and mud in it is so low that it is still conventionally called water.

Najas Thing in the Mouth
Question :

If one gets a najis thing in his mouth, such as pork, how does he purify his mouth? Is it enough to spit it out, or must one wash his mouth once with running water, thrice with little water, etc,?

Answer :

It is not necessary to wash the inside the mouth to make it tahir; it is sufficient to remove the najasah in the said case to restore the taharah.

Removal of Najasah
Question :

I was told that one must remove the essential najasah from a najis object in order to make it tahir again. Is this true?

Answer :

In order to restore the taharah of a najis object with water, the actual najasah, e.g. semen, has to be removed first.

Making Shoes Tahir by Earth
Question :

If my shoes become najis by stepping into najasah, can I make my shoes tahir by rubbing them on the earth?

Answer :

Earth can only make the soles of the shoes, the feet and the like tahir by walking on them, provided that the najasah was caused by walking on the earth.
Earth can make things tahir when it is dry, and based on an obligatory precaution it must be tahir itself.

Making an Electronic Device Tahir
Question :

How would I make an electronic device tahir which has become najis, while the water might damage the device?

Answer :

If the said device becomes najis, then it cannot be made tahir without using water. You can use the device even if it is najis. If your hand is dry, then it does not become najis when it touches it.

Sun Purification
Question :

Can the Sun make permanent fixtures inside a house tahir through glass windows?

Answer :

As an obligatory precaution, the sun can not make anything tahir through glass and the like.

The Sun from the Window
Question :

If the Sun is seen through the window of a room, can it make the floor of my room tahir after it has become najis?

Answer :

The Sun can make permanent flooring tahir, if the window is open and the sun is directly drying it, but it does not make the carpet and the moveable things tahir.

Istibra of the Animal
Question :

How many days are required for the Istibra of animals which eat filth (najasah)?

Answer :

The Istibra of the animal that eats human excrement occurs by preventing the animal from consuming human excrement for a specific number of days, in such a way it is considered as not consuming human excrement, and the period depends on the type of animal.
The sharia defines this period for the camel to be forty days; for the cow to be twenty days (and as a recommended precaution it is thirty days); for the sheep to be ten days (and based on a recommended precaution it is fourteen days and as an obligatory precaution this applies to the goat too); for the duck it is five days (and as a recommended precaution it is seven days); and for the chicken it is three days.
For other animals, as an obligatory precaution one should do the Istibra of the animal based on the longest period after which the animal would conventionally not be regarded as one that consumes human excrement, and also considering the size of the animal and comparing it to the mentioned list.

Seperation of Used Water
Question :

I have read that for making the hand tahir by qaleel water, it is necessary to pour the water on the hand, and when the water flows off the hand the hand will become tahir. Does this apply to all body parts as well as the penis? What if the najasah is urine?

Answer :

Yes, the separation of water from the najis object is a condition in the process of purification if the water used is little (qaleel). This ruling is the same for all parts of the body, including the penis.
If the najasah is urine then one needs to wash the najis object twice when qaleel water is used.

Touching Real Leather
Question :

How do I make myself tahir if I touch real leather of an animal that has not been slaughtered in accordance to Islamic religion? I would normally remove the najasah, then pour water over it a certain number of times, but in this case is there anything to remove?

Answer :

If your hand comes in contact with the impure leather with dampness then it becomes najis even without the actual najasah being transferred to the hand. The hand can be made tahir then by washing it once with water.
If the contact took place without dampness, then this does not make the hand najis.

The Inside of the Car
Question :

If the inside of the car has become najis, and after the removal of the actual najasah it becomes dry by the Sun, will it become tahir?

Answer :

Mobile things such as cars are not made tahir by the Sun.

Change
Question :

Does Istihala occur when any component undergoes a chemical reaction?

Answer :

We cannot present a general principle for this, since the change that results in the taharah of the changed substance occurs when the second state is different from the first one in the conventional understanding, in such a way that people – within conventional norms – consider the second form as a different matter.
An obvious example is the Istihala of wood into smoke or ash.

Najis Clohes
Question :

Do najis clothes need to be dried in the Sun after being made tahir by water?

Answer :

This is not necessary.

Washing with Tap Water
Question :

If the body has become najis through urine, is it sufficient to wash it once using water connected to a large source (e.g. tap-water), if while washing the najasah is being removed?

Answer :

Yes, it is sufficient.

Washing with Kurr Water
Question :

If the body has become najis through urine, is it enough to wash it once by using Kurr water, if while washing the najasah is being removed?

Answer :

Yes, it is enough to do so.