(5) باب الْكَفِيلِ فِي السَّلَمِ
Narrated `Aisha:
Allah's Messenger (ﷺ) bought some foodstuff (barley) from a Jew on credit and mortgaged his iron armor to him (the armor stands for a guarantor).
Reference: Sahih al-Bukhari 2251
In-book reference: Book 35, Hadith 12
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 35, Hadith 453