A mawla of Mansur in his early life, Abu al-Khasib rose to the position of Hajib (chamberlain) in 755.
[1] After the conquest of Tabaristan, he was appointed as its first Abbasid governor, a position he retained until about 763.
[8] Abu al-Khasib was appointed as governor of Tabaristan, a position he held until 763.
[3] Although no coins are known from Abu al-Khasib's tenure as governor of Tabaristan, he is known to have built a great mosque in the city of Sari, probably in 761.
[3] He may have been same as Abdul Hamid, father of al-Khasib who was governor of Egypt during the reign of Harun ar-Rashid, although this is uncertain.