It is narrated from Sayyiduna Umar bin Khattab, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: Selling gold for gold and silver for silver is usury, except when it is hand to hand. Likewise, selling wheat for wheat is usury, except when it is hand to hand. And selling barley for barley is usury, except when it is hand to hand. Similarly, selling dates for dates is usury, except when it is hand to hand.