It has been discussed heretofore that Jafar bin Mansur, the son of Ibn Hawshab was greatly distressed by the internal quarrels in which his brother, Abul Hasan Mansur played a conspiracy in killing Abdullah bin Abbas al-Shawiri in Yamen. Jafar bin Mansur was deadly against his brother and went to Maghrib at the Fatimid court. He reached Maghrib when Imam al-Mahdi had died in 322/934. He was however well received by Imam al-Qaim and his services were amply rewarded and was given the charge of mission. He was held in great esteem for his learning and ability.