Sa'adullah Khan was born in 1591 at
Chiniot,
Lahore Subah, into a
Punjabi Jat family from the
Thahim clan. In his youth Sa'adullah Khan went to study at Lahore under Shaykh Kamal al-Din, a well-known scholar who had had intellectuals like
Abdul Hakim Sialkoti and
Ahmad Sirhindi as his pupils, among others. For a while he taught at the
madrasa of Wazir Khan at Lahore and later went to Delhi, where he became tutor of children of
Abu'l-Hasan Asaf Khan. Sa'adullah Khan first entered in the Mughal bureaucracy in December 1641 on the recommendation of the
Sadar as-Sudur Musavi Khan; an allowance was fixed for him and he was given a robe and a horse. Soon he was appointed as the
arz-i-mukarrar and was given the
mansab of 1000
zat and 200
sowar (1000/200). After serving for a short period in this post he was given the post of
darogha-i-daulat khana-i-khas (superintendent of royal apartments) and rewarded with the title of
Khan. In 1643 his rank was increased to 1500/300. In the same year he was made the
Mir-i-Saman, a minister of great importance, second only to the
Wazir. In 1645 Sa'adullah was granted the post of
Diwan-i-Khalisa; he was also given the charge of drafting royal orders, with a
mansab of 4000/1000. He worked for 46 days in this position before being appointed as the Grand Vizier, with his
mansab ultimately reaching 7000/7000. Sa'adullah Khan would remain the Grand Vizier until his death in 1656. A year after his appointment, Sa'adullah Khan handled administrative issues regarding Shah Jahan's
Balkh and Badakhshan campaigns. Sa'adullah Khan was sent to Balkh to manage the country and make the revenue settlements. Prince
Murad Baksh was relieved of his command while Vizier Sa'adullah only took 22 days to settle the administrative affairs and returned to Kabul. == European accounts ==