[1][2] He was the son of Aslam ibn Zur'a, a chief of the Banu Kilab tribe, leader of the Qays faction in the Muslim armies of Basra and Khurasan, and governor of Khurasan in 677–679.
When most of al-Hajjaj's Basran troops mutinied against him at his camp in Rustuqubadh in Ahwaz after he announced a cut to their stipends,[3] Sa'id was among those who remained loyal to him, for which he was rewarded with the governorship of Makran.
[4] Not long after taking up his post, he was killed in an attack by Muhammad and Mu'awiya, two sons of al-Harith al-Ilafi, who afterward assumed control of the frontier region.
According to al-Baladhuri (d. 892), al-Hajjaj sent Mujja'a ibn Si'r as Sa'id's replacement.
[1] In the wake of Sa'id's death, al-Hajjaj adopted his son Muslim, raising him with his own children.