He stole money and profited from it; does he return only what he stole, or does he return it along with its profits?

Question:
May Allah reward you with good and do you well. A man says: He stole money, then invested it in a business project and profited from it several times over the amount stolen. Now he wants to return the money he stole. What is the ruling on the remaining profits gained from this stolen money? Are they lawful or forbidden? Please give us a ruling, and may Allah reward you. May Allah reward you with good.

Answer:
It is obligatory for him to return the money with its increase, which is the profit, to its owner, and to ask him for forgiveness; because it is money that is not lawful for him.