Narrated Jabir (may Allah be pleased with him): When (my father) Abdullah bin Amr bin Haram (may Allah be pleased with him) was martyred, he had some debt. So I requested the Prophet (peace and blessings of Allah be upon him) to intercede so that some of the debt might be forgiven. The Prophet (peace and blessings of Allah be upon him) expressed this wish to those people, but they did not agree. Then the Prophet (peace and blessings of Allah be upon him) said to me: "Go and separate your dates into different heaps. Keep the Ajwa dates separate and the 'Adhq Zaid separate, then call me." So I did that, and after that I called the Prophet (peace and blessings of Allah be upon him). He came and sat on or among the dates. Then he said: "Now measure out and give to the creditors." So I started measuring and giving to them until I had paid off all the debt, and my dates remained as they were, as if nothing had been diminished from them.

Sidna Miqdam bin Ma'dikarib (may Allah be pleased with him) narrates from the Noble Prophet (peace and blessings of Allah be upon him) that he (peace be upon him) said: "Measure your grain, there will be blessing in it for you."

Narrated by Sayyiduna Abdullah bin Zaid (may Allah be pleased with him) from the Prophet Muhammad (peace and blessings of Allah be upon him) that he said: "Ibrahim (peace be upon him) declared Makkah a sanctuary and prayed for blessings for it, and I have declared Madinah a sanctuary just as Ibrahim (peace be upon him) declared Makkah a sanctuary, and I have prayed for blessings in the 'Mudd' and 'Saa'' of Madinah just as Ibrahim (peace be upon him) prayed for Makkah."

`Sayyiduna Ibn Umar (may Allah be pleased with them both) narrates that those who used to sell grain during the time of the Prophet (peace and blessings of Allah be upon him) without measuring or weighing it, I saw that they were beaten because they were not to sell it until they had taken it to their homes (warehouses and other places of storage).

Narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings of Allah be upon him) forbade that anyone should sell grain before taking possession of it (i.e., before it reaches his store, shop, warehouse, etc.). Ibn Abbas (may Allah be pleased with them both) was asked the reason for this (prohibition), so he replied: This is like selling money for money, because the grain is not delivered at that time (until it comes into his store, warehouse, or shop, etc.).

Ameer-ul-Mu'mineen Umar bin Khattab (may Allah be pleased with him) narrates from the Noble Prophet (peace and blessings be upon him) that he said: "Selling gold for gold, wheat for wheat, dates for dates, and barley for barley is usury, except when it is equal for equal and hand to hand, then it is permissible. (Note: Selling 24-carat gold for 22-carat gold in equal weight is also usury.)"

Narrated Abu Huraira (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) forbade that any townsman should sell the goods of a desert-dweller (outsider), and that the seller should not be told a higher price than the buyer’s price so that he may not sell, while the one telling does not intend to buy himself. And no person should sell over the sale of his brother, nor should he send a marriage proposal to a woman after his brother has already proposed to her, and no woman should seek to have her (Muslim) co-wife divorced with the intention that what is in her co-wife’s mouth may come into her own mouth.

Narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) that a man declared his slave free after his death, but he himself became destitute and needed money. So the Prophet Muhammad (peace and blessings be upon him) took hold of the slave’s hand and said:“Who will buy this slave from me?”Accordingly, Na’eem bin Abdullah (may Allah be pleased with him) bought him for such and such amount. Then the Prophet Muhammad (peace and blessings be upon him) gave that price to his owner.

Narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Noble Prophet (peace and blessings be upon him) forbade the sale of Habal al-Habalah. This sale was prevalent in the days of ignorance in such a way that a person would buy a she-camel and set the payment term as follows: when this she-camel gives birth, and then the offspring in her womb grows up and gives birth (then I will pay the price).

Narrated by Sayyiduna Abu Hurairah (may Allah be pleased with him) from the Prophet Muhammad (peace and blessings be upon him) that he said: "Whoever buys a goat whose udder has been withheld (from milking), and he milks the goat—if he is pleased, he should keep it, and if he is displeased, he should return it and give one sa’ of dates in exchange for the milk."