It is narrated from Abu Minhal that Sayyiduna Zayd bin Arqam and Sayyiduna Bara’ bin Azib (may Allah be pleased with them both) were partners and associates. Once, they bought some silver, part in cash and part on credit. When the Prophet Muhammad (peace and blessings be upon him) came to know of this, he instructed both of them, saying: Keep the transaction that was done in cash, and return what was done on credit.