It is narrated from Sayyiduna Salamah (may Allah be pleased with him) that once I challenged a man to a duel and killed him, so the Prophet (peace and blessings of Allah be upon him) granted me all his equipment as a reward.
Hadith Referenceمسند احمد / مسند المدنيين رضي الله عنهم اجمعين / 16492