It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) passed by a heap of grain in the market of Madinah. He liked it, so he put his hand into it and found something inside that was not apparent on the surface (of the heap). The Prophet (peace and blessings be upon him) expressed disapproval and then said to the grain seller: "There is no deception among Muslims. Whoever deceives us is not from us."

It is narrated from Sayyiduna Abdullah bin Mas’ud (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said:“On the Day of Resurrection, every deceitful person will have a flag. It will be said: This is the deceit of so-and-so. (So that people may know his deceit).”

Sayyiduna Mu’ammar bin Abdullah bin Nafi’ bin Nadlah ‘Adawi (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him), he said twice:“No one hoards except the sinner.”

It is narrated from Sayyiduna Umar (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: "The one who brings goods from outside will be provided with sustenance, and curse will be upon the one who hoards and stores them."

Sayyiduna Anas (may Allah be pleased with him) said: In the time of the Messenger of Allah (peace and blessings be upon him), prices increased greatly, so the people said: O Messenger of Allah! Prices have risen, so fix prices for us. The Messenger of Allah (peace and blessings be upon him) said: "Allah, the Exalted, is the Creator, the Restrainer, the Expander (i.e., sometimes He withholds, sometimes He gives freely), and the One who sets prices. And I hope that when I meet Allah, none of you will have any claim against me regarding injustice in life or wealth."

Sayyiduna Hudhayfah ibn al-Yaman (may Allah be pleased with him) narrated: The Messenger of Allah (peace and blessings be upon him) said: "An angel came to the soul of a man from the previous nations before you (at the time of his death) and asked: 'Did you do any good deeds?' The soul replied: 'No.' They said: 'Recall.' He said: 'I used to lend money to people and would instruct my servants to give respite to those in difficulty and to be lenient with those who were well-off.'" He (the Prophet) said: "Allah Almighty commanded the angels: 'Treat him with leniency, do not be harsh with him.'"

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. Then, if both speak the truth and clarify everything, there will be blessing in their trade (buying and selling), but if both lie and conceal something, the blessing in their transaction will be erased.”

A hadith similar to the previous one is also narrated through this chain.

Sayyiduna Abdullah bin Mas’ud (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) say:“When the seller and the buyer (the one who sells and the one who buys) have a dispute and the sold item (i.e., the goods) is still present as it was, and there is no evidence (or witness) between them, then the statement of the (owner) seller will be considered valid, or both of them should leave (cancel) the transaction.”

Sayyiduna Uqbah bin Amir (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) say: "It is not permissible for a man who believes in Allah and the Last Day to make a deal (sale) over the deal (sale) of his brother until the (other) brother leaves that deal."