Salabat Jung was born Mir Sa'id Muhammad Khan Siddiqi in November 1718. He was the 4th Nizam of Hyderabad and the 3rd son of Nizam-ul-Mulk. He was appointed as Naib Subahdar (Deputy Viceroy) to his elder brother, Ghazi ud-Din Khan Feroze Jung II, the Prime Minister of Mughal Empire, with the title Salabat Jung. He was invested by Imperial firman, at Aurangabad, Maharashtra, 12 September 1749. He was granted the titles of Khan Bahadur and Salabat Jung during his father's lifetime.