How should a person deal with money from a forbidden trade if he repents to Allah?

Question:
May Allah reward you, Your Eminence the Shaykh, may Allah bless you, and may Allah reward you with good for the Muslims. The questioner says: A man accumulated money from haram (forbidden) sources, such as riba (usury or interest) money or the sale of cigarettes and shisha, then he repented and turned back to Allah. How should he deal with that money? Is it permissible for him to invest it in halal (lawful) matters and make it his capital?

Answer:
In the name of Allah, the Most Gracious, the Most Merciful. The Muslim who was dealing in haram (forbidden) matters, such as riba (usury or interest) or otherwise, and then repented to Allah—Allah the Exalted and Majestic accepts repentance from whoever repents. This is glad tidings. If he has money he accumulated from haram (forbidden) sources, then after he repents to Allah, he must get rid of this money by placing it in public projects. He places it in public projects such as roads and restrooms; he builds restrooms for people to use, or he uses it for repairing roads for the people. He gets rid of it and puts it in public projects that benefit people, and Allah will accept his repentance. It is not permissible for him to invest it while it is haram (forbidden). It is not permissible for him to keep it as his property, because it is not his property; it is haram (forbidden). So he places it in public projects that benefit people and gets rid of it.