What does one do who repents from forbidden trade and whose wealth has become mixed from lawful and forbidden trade?

Question:
The questioner says: A man was selling forbidden goods due to his ignorance and negligence, then he repented to Allah the Exalted and turned to lawful trade, but his wealth became mixed. What should he do?

Answer:
The wealth that came to him through a forbidden path is not permissible for him to use because it is haram (forbidden). So he must estimate it; if he does not know the exact amount of the forbidden portion, he must estimate it, exert his effort, and give it in charity. He gives the haram (forbidden) earnings in charity, meaning he gets rid of it. It is not considered a sadaqah (voluntary charity) in the sense of gaining reward, because Allah is Pure and does not accept anything but what is pure. However, the meaning of giving it in charity is that he disposes of it and gives it to those who are entitled to it, because it is lost wealth with no owner. So he gives it to the entitled recipients along with his repentance to Allah the Exalted. And may Allah send prayers and blessings upon our Prophet Muhammad, and upon his family and all his Companions.