Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates: In the blessed time of the Prophet Muhammad (peace be upon him), there was a man who used to buy and sell, and he had a stammer in his speech. His family came to the service of the Prophet (peace be upon him). They said: O Messenger of Allah, please stop so-and-so from conducting transactions because he buys and sells, but his speech is not clear. The Prophet (peace be upon him) called him and forbade him from buying and selling. So he said: O Messenger of Allah (peace be upon him), I cannot manage without buying and selling. Then the Prophet (peace be upon him) said: If you do not stop buying and selling, then say: "This is it and this is it, and there will be no deception."

Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates: In the blessed era, the Prophet Muhammad (peace be upon him) there was a man who used to buy and sell. He had a stammer in his speech. His family members came to the service of the Prophet Muhammad (peace be upon him). They submitted, "O Messenger of Allah (peace be upon him)! Please stop so-and-so from conducting transactions because he buys and sells and he has a stammer in his speech." The Prophet Muhammad (peace be upon him) called him and forbade him from buying and selling. So he submitted, "O Prophet of Allah, I cannot manage without buying and selling." The Prophet Muhammad (peace be upon him) said: "If you do not refrain from buying and selling, then say: 'This is it and this is it, and there will be no deception.'"

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: A man was mentioned before the Prophet (peace and blessings of Allah be upon him) who used to be deceived in buying and selling, so the Prophet (peace and blessings of Allah be upon him) said to him: "When you make a transaction with someone, say: 'There will be no deception.'" So whenever that man made a transaction, he would say: "There will be no deception."

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: A man was mentioned before the Prophet (peace and blessings be upon him) who used to be deceived in business transactions. The Prophet (peace and blessings be upon him) said: When you buy or sell something, say: "No deception will be tolerated." The narrator says: So when that man would sell something, he would say: "No deception will be tolerated."

Sayyiduna Abu Huraira (may Allah be pleased with him) narrates this statement of the Noble Prophet (peace and blessings of Allah be upon him): "Delaying payment by a wealthy person is oppression, and when someone is referred to another for collection, he should go to that (other person)."