Amatul Rahmân Omer:
Those who practice usury and interest, (their condition is such as) they will not be able to stand except like the standing of one who has lost his reason under the influence of satan. That is so because they say, `Trade is just like usury and interest.´ Whereas Allah has made trade lawful and made interest unlawful. Then whosoever has received (this) admonition from his Lord and keeps away (from usury and interest) he may keep whatever (interest) he has taken in the past. His matter rests with Allâh. As for those who revert (to the practice of usury and interest) it is these who are the fellows of the Fire, therein shall they live for long.