Abdullah bin Umar (may Allah be pleased with them both) narrates: The Prophet Muhammad (peace and blessings be upon him) appointed Zaid bin Harith (may Allah be pleased with him) as the commander on the occasion of the Battle of Mu'tah. The Prophet (peace be upon him) said: If Zaid is martyred, then Ja'far will be the commander, and if Ja'far is martyred, then Abdullah bin Rawahah will be the commander. Abdullah (may Allah be pleased with him) narrates: I was with those people in that battle. We searched for Ja'far bin Abi Talib (may Allah be pleased with him), and we found him among the slain. We found on his body more than seventy marks of wounds and arrows.