It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both), he says: I was traveling while riding on a camel, suddenly it became exhausted, and I was about to abandon it when the Messenger of Allah (peace and blessings be upon him) met me. He (peace and blessings be upon him) struck it with his foot and prayed for it, then it walked in such a manner as it had never walked before. Then the Prophet (peace and blessings be upon him) said: Sell me this camel for one uqiyah. But I was reluctant to make the deal, yet the Prophet (peace and blessings be upon him) said: Sell it to me. So I sold it, but on the condition that I could ride it until I reached my family. When we reached Madinah, I brought the camel to the Prophet (peace and blessings be upon him). He (peace and blessings be upon him) said: Do you think I wanted to take your camel by offering a low price? Here, take your camel and take its price; both are yours.

It is also narrated from Sayyiduna Jabir bin Abdullah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: Whoever sells a slave and the slave possesses some wealth, then that wealth will belong to the seller, and any debt of the slave will also be the responsibility of the seller, unless the buyer stipulates otherwise.

It is the hadith of Sayyida Aisha (may Allah be pleased with her), when she wanted to free Sayyida Barirah (may Allah be pleased with her), but her owners set the condition that the wala’ (right of inheritance/loyalty) would remain with them. But the Noble Prophet (peace and blessings be upon him) said: Buy her and set her free; the wala’ belongs only to the one who sets free.

Narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that an Ansari or a Qurayshi man used to be deceived in business transactions, and he had a stammer in his speech. So he complained to the Messenger of Allah (peace and blessings be upon him) about the loss he suffered. The Prophet (peace and blessings be upon him) said to him: When you are about to make a deal, say:“No deception.”Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) says: By Allah! It is as if I am still hearing him stammering and saying:“No deception.”

Narrated by Sayyiduna Anas bin Malik (may Allah be pleased with him): In the blessed era of the Messenger of Allah (peace and blessings be upon him), there was a man who used to trade, but he was somewhat weak in intellect. Therefore, his family came to the Noble Prophet (peace and blessings be upon him) and said, "O Messenger of Allah! Please put a restriction on this man, because he makes deals and is weak-minded (thus he suffers losses)." The Noble Prophet (peace and blessings be upon him) called him and forbade him from trading, but he said, "O Messenger of Allah! I cannot live without trading." The Prophet (peace and blessings be upon him) said, "If you cannot give up this buying and selling, then when you make a deal, say: 'Take this, sir, and give that,' but let there be no deception."

Muhammad, while narrating an incident, says: When he came, Abdullah was given the choice between thirty thousand and silver vessels; he chose the vessels. Then, when traders came from (the region of Bahrain) Darin, Abdullah sold them ten of those silver vessels in exchange for thirteen vessels. Then, when he met Sayyiduna Abu Bakr (may Allah be pleased with him), he said: Do you know how I deceived them? He asked: How? Then he explained the whole detail. Upon hearing this, Sayyiduna Abu Bakr (may Allah be pleased with him) said: I urge you or I swear to you that you must return this transaction, because the Messenger of Allah (peace and blessings be upon him) forbade such trade.

It is narrated from Sayyiduna Hakim bin Hizam (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: The buyer and the seller have the option (to cancel the transaction) as long as they have not separated. If both act truthfully in the transaction and make everything clear, they will be blessed in their trade; but if they lie and conceal (defects, etc.), the blessing will be taken away from their trade.

It is narrated from Sayyiduna Abu Barzah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: The two persons involved in a transaction have the option (to cancel the sale) as long as they do not separate.

Narrated by Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: The two persons involved in a transaction have the option (to cancel the deal) until they separate, unless it is a trade with the option (already specified), or one says to the other: You have the option.

(Second chain) It is narrated from Sayyiduna Abdullah bin Umar, may Allah be pleased with them both, that the Messenger of Allah, peace and blessings be upon him, said: When two people engage in a transaction with each other, each of them has the option to cancel the deal until they separate, or one may give the option to the other and he accepts it, and then they make the sale upon that, then the deal becomes final. And if, after making the sale, they separate in such a state that neither of them has abandoned the transaction, then even so, the deal is established.