Abu Salih Ziyad heard from Hazrat Abu Sa'id Khudri (may Allah be pleased with him) that a dinar can be exchanged for a dinar and a dirham for a dirham (sold in exchange). Upon this, I said to him that Ibn Abbas (may Allah be pleased with them) does not permit this. Abu Sa'id (may Allah be pleased with him) narrated that then I asked Ibn Abbas (may Allah be pleased with them) about this, whether you heard this from the Prophet (peace and blessings of Allah be upon him) or found it in the Book of Allah? He said that I do not claim either of these things. You people know the hadiths of the Messenger of Allah (peace and blessings of Allah be upon him) better than I do. However, Usama (may Allah be pleased with him) informed me that the Noble Prophet (peace and blessings of Allah be upon him) said (that in the mentioned cases) usury only occurs in the case of credit.