We were discussing pledges given as security in transactions involving deferred payment in the presence of Ibrahim, and he said, Aswad related to me from Ayesha that the Prophet ﷺ purchased some food from a Jewish man on credit for a specified term, and he pledged to him an iron coat of mail as security.
تذاكرنا عند إبراهيم الرهن في السلف، فقال: حدثني الأسود، عن عائشة-رضي الله عنها- أن النبي ﷺ: اشترى من يهودي طعاما إلى أجل معلوم، وارتهن منه درعا من حديد.
Bukhari narrated it in the Book of Salam (2252), and Muslim in the Book of Musaqah (1603: 126), via Abdul-Wahid bin Ziyad, who said, Amash narrated to us, and he mentioned it. The wording given is Bukhari's, while Muslim's version has, "We mentioned the pledge in salam."