'A'isha (Allah be pleased with her) reported that Messenger of Allah ﷺ bought from a Jew grain for a specified time; and gave him iron coat-of-mail of his as a pledge.

ذَكَرْنَا الرَّهْنَ فِي السَّلَمِ عِنْدَ إِبْرَاهِيمَ النَّخَعِيِّ فَقَالَ حَدَّثَنَا الأَسْوَدُ بْنُ يَزِيدَ عَنْ عَائِشَةَ أَنَّ رَسُولَ اللَّهِ ﷺ اشْتَرَى مِنْ يَهُودِيٍّ طَعَامًا إِلَى أَجَلٍ وَرَهَنَهُ دِرْعًا لَهُ مِنْ حَدِيدٍ