Abu Salih says: When I heard Abu Saeed saying that gold for gold should be equal, I met Sayyiduna Ibn Abbas (may Allah be pleased with them both) and said to him: What is your opinion about what you say, have you found this thing in the Noble Qur'an or heard it from the Messenger of Allah (peace and blessings be upon him)? He said: This is not something that I have found in the Book of Allah or heard from the Messenger of Allah (peace and blessings be upon him), rather Sayyiduna Usamah bin Zaid (may Allah be pleased with them both) informed me that the Messenger of Allah (peace and blessings be upon him) said that usury is in credit.