Yahya bin Abbad bin Abdullah bin al-Zubayr narrates from his father, who said: My (foster) father, who had me nursed, was a man of Banu Murrah bin Awf. He said: By Allah, it is as though I am looking at Ja'far bin Abi Talib (may Allah be pleased with him) on the day of the battle of Mu'tah, when he leapt down from his reddish (shaqra') horse and hamstrung it, then advanced and fought until he was martyred.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18136