Those who live on usury will not rise (on Doomsday) but like a man possessed of the devil and demented. This because they say that trading is like usury. But trade has been sanctioned and usury forbidden by God. Those who are warned by their Lord and desist will keep (what they have taken of interest) already, and the matter will rest with God. But those who revert to it again are the residents of Hell where they will abide for ever.
— Quran 2:275