It is narrated from Urwah (may Allah have mercy on him) that "Sayyiduna Sa'd bin Mu'adh (may Allah be pleased with him) sent al-Harith bin Aws bin al-Nu'man, the brother of Banu Harithah, with Sayyiduna Muhammad bin Maslamah (may Allah be pleased with him) to Ibn al-Ashraf. When he struck Ibn al-Ashraf, the tip of the sword hit the leg of al-Harith (may Allah be pleased with him), so his companions carried him."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3373