As regards other impure things...

As regards other impure things, their sale and purchase is permissible only if it is proposed to obtain lawful gain from them (e.g. manufacturing manure from faeces), although, as a precaution, their sale and purchase should also be avoided. (ii) Sale and purchase of usurped property. (iii) On the basis of precaution sale and purchase of those things which are not usually considered, to be merchandise is unlawful (for example, the sale and purchase of ferocious beasts).

(iv) Any transaction which involves interest. (v) Sale and purchase of those things which are usually utilized for an unlawful act only (e.g. gambling tools). (vi) To sell a thing in which something else is mixed and it is neither possible to detect the adulteration nor the seller informs the buyer about it (e.g. to sell ghee mixed with fat). This act is called cheating (ghash) or adulteration.

The holy Prophet of Islam has said: "If a person sells something to the Muslims or harms them, or practices deceit upon them, he is not one of my' followers. And as and when a person cheats his brother Muslim (i.e. sells him an adulterated commodity) Allah deprives him of his livelihood, closes the means of his earnings and leaves him to himself (i.e. deprives him of His blessings). 2064.

There is no harm in selling a pure thing which has become impure and can be purified by washing it with water. However, if the buyer wants to utilize it for a purpose for which purity is a condition precedent, for example if it is a kind of food which he wants to eat the seller should tell him about its being impure.

In case, however, it is a dress it is not necessary that the buyer should be told about its being impure though he may use it for offering prayers, because in prayers the apparent purity of body and dress is sufficient. 2065. If a thing like ghee and oil, which cannot be purified by washing with water, becomes impure and if it is to be used for a purpose for which purity is a condition precedent (e.g.

if ghee is required for eating) it is necessary for the seller to inform the buyer about its being impure.