Abu Minhal says: I asked Sayyiduna Bara’ bin Azib and Sayyiduna Zayd bin Arqam (may Allah be pleased with them both) about the exchange of gold and silver, but one of them said: Ask him, for he is better and more knowledgeable than me, and the other said: Ask him, for he is better and more knowledgeable than me. Then I asked both of them, and both said: The Messenger of Allah (peace and blessings be upon him) forbade selling gold for silver on credit.