4. Ahmad ibn Muhammad from has narrated from al-Washsha’ from abu al-Mighra’ from al-Halabiy, who has said the following: “Abu ‘Abd Allah عليه السلام, has said, ‘Any kind of Riba ’ people have consumed in ignorance then repented, such repentance is accepted if such repentance is found in them.’ He (the Imam) then said, ‘If a man inherits goods, from his father and knows that there is Riba ’ in it but is mixed in trade with other lawful goods it is lawful and clean for him and he has permission to consume such properties. If however, he comes to know the Riba ’ item, he then must separate his capital and return the Riba’ property. If one earns a great deal of property in which there is a great deal of Riba’ but does not know such property exactly and afterwards comes to know it and wants to remove it, what is passed is for him but he must stay away from Riba ’ in coming times.’”