We argued at Ibrahim's dwelling place about mortgaging in Salam. He said, "Aisha said, 'The Prophet ﷺ bought some foodstuff from a Jew on credit and the payment was to be made by a definite period, and he mortgaged his iron armor to him."  

تَذَاكَرْنَا عِنْدَ إِبْرَاهِيمَ الرَّهْنَ فِي السَّلَفِ فَقَالَ حَدَّثَنِي الأَسْوَدُ عَنْ عَائِشَةَ ؓ أَنَّ النَّبِيَّ ﷺ اشْتَرَى مِنْ يَهُودِيٍّ طَعَامًا إِلَى أَجَلٍ مَعْلُومٍ وَارْتَهَنَ مِنْهُ دِرْعًا مِنْ حَدِيدٍ