2. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from ibn Ri’ab who has that I know this Hadith through Muhammad ibn Muslim only who has said the following: “This is concerning my question before abu ‘Abd Allah عليه السلام, about the case of a man who worked with dirhams that had copper in them or such other things and he then sold them. He (the Imam) said, ‘If that is what is among people then it is not harmful.’”