الكافي- ط الاسلامية, volume 5, page 145

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 (a.s.), 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.’”

Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.

5. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Hammad from al-Halabiy who has said the following: “Abu ‘Abd Allah (a.s.), has said that once a man came to my father and said, ‘I have inherited a certain amount of property and I knew the owner from whom I inherited received Raba’ and I know with certainty there is Riba’ in it and I do not feel happy to consume it because of my knowledge about it. I asked the scholars of law of Iraq about it and they said, ‘It is not lawful to consume it.’ Abu Ja‘far (a.s.), said, ‘If you know exactly Riba’ property in it and you know the owner also, you must separate it and return to the owner. If it is mixed you can consume it in good health and pleasure. It is your property but you must stay away from what the previous owner would do. The Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, granted relief to what is passed and prohibited from Riba ’ in coming times. If one is ignorant he is exempt, until he comes to know of the unlawfulness of Riba Once a person learns that Riba ’ is unlawful and punishment becomes necessary if one consumes Riba’ just as it (punishment) is necessary for one who has consumed Riba’.’”

Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.

6. Ali ibn Ibrahim has narrated from his father from Hammad ibn ‘Isa from Ibrahim ibn ‘Umar af-Yamaniy who has said the following: “Abu ‘Abd Allah (a.s.), has said that Riba’ is of two kinds: One kind is that which is consumed and the other kind is not consumed. The gift that one presents to someone in order to receive Thawab (rewards from Allah) is better. Of this kind is the Riba’ which is consumed as it is mentioned in the words of Allah, most Majestic, most Glorious, ’The Riba’ in which you are involved so it increases in people’s property does not increase before Allah.’ (30:38) The other kind of Riba’ is that which Allah, most Majestic, most Glorious, has prohibited and has warned those involved in it with punishment in the fire.”

Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.