'If ye do it not, take notice of war from 'Allah and His Apostle: But if ye turn back,ye shall have your capital sums ...' (Q.2:279) The quotation above war...

The quotation above warns against usury, which is the practice of lending money with interest. In Islam, charging or paying interest (riba) on loans is considered a major sin and is strictly prohibited. This verse is part of a larger passage in the Quran that speaks out against usury and encourages people to avoid it. The verse warns that if people do not refrain from usury, they will face war from Allah and His Prophet, but if they repent and turn away from this practice, they will be able to keep their capital. In summary, this verse is a warning against the practice of usury and encourages people to avoid it in order to avoid the consequences described in the verse.