It is narrated from Yahya ibn Sa'id that the Messenger of Allah, may Allah bless him and grant him peace, ordered both Sa'ds that all the vessels of gold and silver that came in the spoils of war should be sold. They sold three vessels for four in cash, or four for three in cash. The Messenger of Allah, may Allah bless him and grant him peace, said: "Both of you have engaged in usury; cancel this sale."