The Holy Prophet (S) said: "He who purchases the food stuff which is a public necessity and stores it for forty days with the hop...
The Holy Prophet (S) said: "He who purchases the food stuff which is a public necessity and stores it for forty days with the hope that its price will go up in the Muslim market, then, sells it and gives the entire sum as charity to the poor, it can not be the atonement for what he has done."
Bihar-ul-Anwar, vol. 103, p. 89
Imam Amir ul Mu'mineen ‘Ali (‘a) said: "He who ventures transactions without observing the concerning Islamic rules, has surely run into usury," (while he is not aware of it).
Bihar-ul-Anwar, vol. 103, p. 93
Imam Amir ul Mu'mineen ‘Ali (‘a) narrates from the Messenger of Allah who said: "He who is in business and buys and sells things must avoid five traits, otherwise he should not buy or sell anything: usury, taking oath, concealing the faults or defects of the goods, praising it wrongly when selling it, and finding faults in it when buying it."
Al-Khisal by Saduq, vol. 1, p. 286
Imam al-Baqir, the fifth Imam (‘a) said: "He who seeks for sustenance in this world in order to be independent of people for his needs, to provide for his famlly members, and to stretch affection unto his neighbours, will meet Allah, Almighty and Glorious, on the Day of Judgement while his face will be as bright as the full moon."
Al-Kafi, vol. 5, p. 78
Fraud in Bargain
The Holy Prophet (S) said: "He who sleeps bearing deceit against his Muslim brother in his heart, has slept in the wrath of Allah and remains in that case until he repents."
Safinat-ul-Bihar, vol. 2, p. 318
The Holy Prophet (S) said: " ...And he who deceives his Muslim brother, Allah takes away the abundancy of his sustenance and spoils his livelihood and leaves him to his ownself."
Wasa'il-ush Shi'ah, vol. 17, p. 283
Imam as-Sadiq (‘a) said: "The Holy Prophet (S) prohibited that milk be mixed with water for sale."
At-Tahthib, vol. 7, p. 13
Imam as-Sadiq (‘a) said: "Those who play imposture with us (Muslims in general) is not from us."
The Holy Prophet (S) said: "The person who deceives a Muslim believer in buying or selling (things), is not of us, and, on the Resurrection Day, will be raised among the Jews, because they have been the most deceitful against Muslims."
Bihar-ul-Anwar, vol. 103, p. 80
Imam Hadi, the tenth Imam (‘a), said: "People are respected in this world for possessing wealth and in the Hereafter for possessing righteous deeds."
Bihar-ul-Anwar, vol. 78, p. 368
The Holy Prophet (S) said: "The destruction of my female followers is in two things: gold and immodest clothes; and the destruction of my male followers lies in abandoning knowledge and compiling wealth."
