Ruling on money earned from haraam sources
Question

Is it true that if a man who gathered his wealth from haraam sources such as selling wine and manufacturing it, or making and distributing drugs, repents to Allaah, then his wealth becomes halaal?.
Praise be to Allah.If he knew at the time of earning haraam money that it was haraam, then it does not become permissible for him when he repents, rather he has to get rid of it by spending it on charitable causes. 
And Allaah is the Source of strength.