What do the esteemed Muftis say regarding this issue: If a person takes unlawful money, such as an interest-based loan, and starts a business with it, will the profit generated from this business be considered lawful (halal) or unlawful (haram)?
Taking a loan on interest and conducting business with it is unlawful and prohibited. However, if someone, due to compulsion or ignorance, has taken an interest-based loan and earned profit through a lawful business, then there is leeway to utilize that profit.