Abu Hurairah · The Book of Transactions

Two types of trarisactions have been forbidden (by the Holy Prophet), al-Mlulamasa and al-Munabadha. As far as Mulamasa transaction is concerned, it is that every one of them (the parties entering into transaction) should touch the garment of the other without careful consideration, and al-Munabadha is that every one of them should throw his cloth to the other and one of them should not see the cloth of his friend.

A Muslim should not purchase (in opposition) to his brother.

Do not go out to meet riders to enter into transaction with them; none of you must buy in opposition to another, nor must you bid against one another; a townsman must not sell for a man from the desert, and do not tie up udders of carnels and sheep, and he who buys them after that has been done has two courses open to him: after he has milked them he may keep them if he is pleased with…

Do not meet the merchandise (in the way).

Do not meet the merchant in the way and enter into business transaction with him, and whoever meets him and buys from him (and in case it is done, see) that when the owner of (merchandise) comes into the market (and finds that he has been paid less price) he has the option (to declare the transaction null and void).

The townsman'should not sell for a man from the desert (with a view to taking advantage of his ignorance of the market conditions of the city). And Zuhair reported from the Prophet (ﷺ) that he forbade the townsman to sell on behalf of the man from the desert.

He who bought a goat having its udder tied up should go back with it, milk it, and, if he is satisfied with its milk, he should retair it, otherwise he should return it along with a sa' of dates.

He who buys a goat with its udder tied up has the option to retain the goat if he so desires or return it within three days, and in case he returns it he should do so along with a sa' of dates.

lie who buys a goat having its udder tied up has the option to return it within three days. If he returns it he should pay a sa' of dates. Wheat is not essential.

He who buys a goat having its udder tied up has two courses left for him. He may retain it, and if he desires may return it along with a sa' of dates and not wheat.

He who bought foodgrain should not sell it until he had measured it. In the narration of Abu Bakr there the word is Ibta' instead of Ishtara.

Have you made lawful the transactions involving interest? Thereupon Marwan said: I have not done that. Thereupon Abu Huraira (ﷺ) said: You have made lawful the transactions with the help of documents only, whereas Allah's Messenger (ﷺ) forbade the transaction of foodgrains until full possession is taken of them. Marwan then addressed the people and forbade them to enter into such transactions (as are done with the help of documents). Sulaiman said: I saw the sentinels snatching (these documents) from…

Do not sell the fruits until their good condition becomes evident."

Do not buy the fruit until their condition is clear, and do not buy the fresh dates. A hadith like this has been reported by Ibn 'Umar through another chain of transmitters.

He who has land should cultivate it or lend it to his brother, but if he refuses, he should retain his land.