Those who devour usury will not stand except as stand one whom the Evil one by his touch Hath driven to madness. That is because they say: "Trade is like usury," but God hath permitted trade and forbidden usury. Those who after receiving direction from their Lord, desist, shall be pardoned for the past; their case is for God (to judge); but those who repeat (The offence) are companions of the Fire: They will abide therein (for ever). (2:275)

O ye who believe! Devour not usury, doubled and multiplied; but fear God; that ye may (really) prosper. (3:130)