Abdullah bin Abi Bakr bin Muhammad bin Amr bin Hazm said: Sayyiduna Abdullah bin Rawahah (may Allah be pleased with him) assessed (estimated the produce) for the people of Khaybar for only one year, then he was martyred at the Battle of Mu'tah. After that, the Messenger of Allah (peace and blessings be upon him) would send Sayyiduna Jabbar bin Sakhr bin Khansa' (may Allah be pleased with him), and he would make the assessment for them after Ibn Rawahah.
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2123