The Messenger of Allah (may Allah's peace and blessings be upon him) bought food from a Jew and pledged him his iron armor
Authentic hadithعن عائشة بنت أبي بكر رضي الله عنهما أن رسول الله -صلى الله عليه وسلم اشترى من يهودي طعاما، ورهنه دِرْعًا من حديد.
‘Ā'ishah bint Abu Bakr (may Allah be pleased with him) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) bought food from a Jew and pledged him his iron armor.
Explanation
The Prophet (may Allah's peace and blessings be upon him) bought barley to serve as food from a Jew, and pawned his coat of mail that he needed for Jihad with him. The Prophet (may Allah's peace and blessings be upon him) used to wear that armor in war to give himself extra protection from the enemy's weapons.
Source · Narrated by Bukhari & Muslim
From the Hadith Encyclopedia (hadeethenc.com).