That is because they say : " Trading is only like Riba ( usury ) , " whereas Allah has permitted trading and forbidden Riba ( usury ) . So whosoever receives an admonition from his Lord and stops eating Riba ( usury ) shall not be punished for the past ; his case is for Allah ( to judge ) ; but whoever returns [ to Riba ( usury ) ] , such are the dwellers of the Fire - they will abide therein .