The World Federation One Stop Fiqh

Ruling 2304

If a person purchases some clothing and afterwards pays for it with money acquired through usury or with lawful money mixed with such money, he becomes the owner of it and there is no problem in him wearing it and performing prayers in it. However, if he says to the seller, ‘I am purchasing this clothing with this money’, then he does not become the owner of it and wearing it is unlawful.