If lawful property has become mixed with unlawful property in a way that a person cannot distinguish one from the other, and if the owner and the quantity of the unlawful property are not known, and if one does not know whether the quantity of the unlawful property is less or more than one-fifth of the entire property, then by paying khums on it, it becomes lawful. And based on obligatory precaution, the khums must be given to someone entitled to receive both khums and radd al‑maẓālim.