Is money reimbursed by someone whose source of money was unlawful considered as consuming unlawful money? Is it forbidden to take it as a debt, knowing its source? And is eating a meal from his money unlawful?

The creditor recovering their debt from the debtor's unlawfully acquired money has two scenarios:

1. If the creditor is certain that the debtor is settling the debt with money acquired without the owner's consent (theft or usurpation), then it is not permissible for the creditor to take it as settlement for their debt, because it infringes upon the right of another. 2. If the debtor acquired the unlawful money with the owner's consent (such as money obtained through usurious interest or gambling), then there is no objection for the creditor to recover their debt from such money.