(The battle was about protection from the external threat. Your prime duty remains to preserve a benevolent society, to which usury is a big detriment). Usury is the return on money while trade is the return on labor (2:275). O You who have chosen to be graced with belief! Do not eat up other people's money by way of usury that appears to you ever-increasing. But Allah's Law blights usury and flourishes acts of caring (2:276). Walk aright in the Way of Allah to attain true prosperity.