Abbad bin Abdullah bin al-Zubayr (may Allah have mercy on him) narrates: My foster father, who was one of the Banu Murrah bin Awf and took part in the Battle of Mu'tah, told me: By Allah, it is as though I am looking at Sayyiduna Ja'far bin Abi Talib (may Allah be pleased with him) when he leapt down from his sorrel horse and then fought the enemy until he was martyred.
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1449