Isḥāq ibn Ibrāhīm al-Ḥanẓalī narrated to us, al-Makhzūmī informed us, ʿAbd al-Wāḥid ibn Ziyād narrated to us, from al-Aʿmash, who said: We mentioned pledging collateral in a salam transaction (advance payment for goods) in the presence of Ibrāhīm al-Nakhaʿī, and he said: al-Aswad ibn Yazīd narrated to us, from ʿĀʾishah, that the Messenger of Allah (peace be upon him) bought food from a Jew for a deferred term and pledged him his iron armor as collateral.