But if you do not, do what you have been commanded, then be warned, have knowledge, of war from God, and His Messenger, against you: herein is a grave threat for them. When it was revealed, they said, ‘What power can we have in a war against Him!’ Yet if you repent, and forgo it, you shall have your principal sums, the original amounts, not being unjust, by charging interest, and no injustice being done to you, by way of any diminution.