I lent a man a sum of money on the condition that he repay it to me in installments, then I learned that he is repaying these installments from forbidden wealth, such as theft or usury. What is the ruling?

The questioner : A man borrowed money from me, so he began to repay me every month in installments. I learned that these installments, which are the money he owes me, are from forbidden sources, such as theft or usury. What is the ruling of the Shari'ah regarding this?

The Shaykh : If it is from theft, you should not take it. But if it is from usury, it is lawful for you and forbidden for him. Is that clear?

The questioner : Clear. May Allah reward you with good.