The zakah of wealth acquired from riba (usury or interest)

Question:
He says: Honorable Shaykh, may Allah grant you success, if a person earns wealth from riba (usury or interest), is he required to pay zakah on it, or if part of his wealth is from riba?

Answer:
It is not permissible for him to possess it until zakah becomes obligatory upon it. Riba money and what is forbidden are the same, whether from riba, or from, or from bribery, or from gambling. All forbidden earnings are not permissible for him to possess or hold. We do not say he must pay zakah on it; rather, we say it is not permissible for him to keep it. He must dispose of it, placing it in a legitimate project or distributing it to those in need, and he must get rid of it so that it does not remain with him. You do not tell him to keep it and pay zakah on it; no, that is not permissible. Yes.