The Cow - 2:275
"Those who eat usurious money rise up like one who is struck by the devil. This is because they say, "Usury is like shopping". But Allah has made shopping lawful and usury unlawful. And whoever receives a reminder from his Lord and desists, he may keep what he has earned in the past, and his affair is up to Allah. As for those who continue, they are the inhabitants of Hell, and they will abide therein forever."
Related:
The Cow/2:188
Do not eat your money unjustly among yourselves. And do not bribe officials/managers with the intention of taking the people´s money unjustly.
The Women/4:29
Believers! Do not eat one another´s property by injustice and deceit, even in consensual trade. Do not kill one another. Allah is Most Merciful to you
The Romans/30:39
The usury money which you give to increase in the wealth of the people does not increase with Allah. But as for the zakat which you give seeking Allah´s Pleasure, those who give it multiply their investment.