Abu Qilabah says that once Sayyiduna Hisham bin 'Amir came to Basra and saw that people used to take gold on credit in exchange for silver until the date of receiving their stipend. Sayyiduna Hisham bin 'Amir forbade them and said that the Prophet (peace be upon him) forbade us from buying and selling gold on credit in exchange for silver and informed that this is exactly usury.