He was initially appointed as a governor of Bengal by Emperor Islam Shah Suri of the Sur Empire in 1545,[2][self-published source?]

[3] Qazi Fazilat's term as Chief of all of the Muqtas of Bengal ended following the death of Emperor Sher Shah Suri in 1545.

However, following Islam Shah's death in 1553, Muhammad declared independence from Delhi, effectively reestablishing the weakening Bengal Sultanate by starting his own dynasty.

His issued coins bore the Shahada and the names of the four Rashidun; Abu Bakr, Omar, Uthman and Ali.

[5] Vying for power in North India, Muhammad Shah conquered Jaunpur and proceeded for Delhi, the capital of the Sur Empire.