Fair Trade

{17:35} and give full measure when you measure out, and weigh with a true balance; this is fair and better in the end.

{83:1} Woe to the defrauders,

{83:2} who, when they take the measure (of their dues) from men take it fully,

{83:3} But when they measure out to others or weigh out for them, they are deficient.

{83:4} Do not these think that they shall be raised again?

{38:24} …. and most surely most of the partners act wrongfully towards one another, save those who believe and do good, and very few are they; ……

{2:275} those who swallow down usury cannot arise except as one whom Shaitan has prostrated by (his) touch does rise. That is because they say, trading is only like usury; and Allah has allowed trading and forbidden usury. To whomsoever then the admonition has come from his Lord, then he desists, he shall have what has already passed, and his affair is in the hands of Allah; and whoever returns (to it)-- these arc the inmates of the fire; they shall abide in it.

{2:276} Allah does not bless usury, and He causes charitable deeds to prosper, and Allah does not love any ungrateful sinner.

{2:278} O you who believe! Be careful of (your duty to) Allah and relinquish what remains (due) from usury, if you are believers.

{3:130} O you who believe! Do not devour usury, making it double and redouble, and be careful of (your duty to) Allah, that you may be successful.

{30:39} And whatever you lay out as usury, so that it may increase in the property of men, it shall not increase with Allah; and whatever you give in charity, desiring Allah's pleasure-- it is these (persons) that shall get manifold.

Comment: The archaic definition of Usury (Riba in Arabic) is the charging of interest at any rate. This has also been prohibited in the Bible. Riba also includes selling a commodity at an extortionate rate. It is one of the Major sins in Islam.