|Najabat Ali Khan Bahadur|
|Nawab Nazim of Bengal, Bihar and Orissa (Nawab of Bengal)|
Saif-ul-mulk (Sword of the Country)
Suja-ud-Daulah (Hero of the State)
Shahmat Jang (Arrow in war)
|9th Nawab Nazim of Bengal,Bihar and Orissa|
|Reign||22 May 1766 - 10 March 1770|
|Coronation||May 22, 1766 (age 17 years old), just after the death of his brother Nawab Nazim Nazam-ud-Daulah, who preceded him.|
|Predecessor||Nazim-ud-din Ali Khan|
|Successor||Ashraf Ali Khan|
|Died||10 March 1770 (aged 20-21)|
Sayyid Najabat Ali Khan Bahadur, born Mir Phulwari (Bengali: ; 1749 - March 10, 1770), better known as Saif ud-Daulah succeeded his younger brother Nawab Nazim Najimuddin Ali Khan, after his death in 1766, as the Nawab Nazim of Bengal, Bihar and Orissa.
He was the third son of Mir Jafar by Munny Begum. He was only seventeen when he was crowned as the Nawab. He reigned under the regency of his mother and died of smallpox on March 10, 1770 during the Great Bengal famine of 1770.
After the death of Najimuddin Ali Khan, his younger brother Najabat Ali Khan, better known as Saif ud-Daulah, succeeded him and was placed on the Masnad (throne) at the age of 17. The management developed upon his mother, Munny Begum. On May 19, 1766 a treaty was concluded in which the East India Company was to pay him the reduced stipend of INR41,86,131 and 9 Anas (INR1=12 Anas), namely INR17,78,854 and 1 Ana for the Nawab's household and INR 24,07,277 and 8 Anas for the support of the Nizamat.
Saif ud-Daulah was formally installed on the Khahar Balish, at Murshidabad Fort on May 22, 1766 which was confirmed by Mughal Emperor Shah Alam II on June 27, 1766. However real authority passed into the chamber of the Directors in London who considered that the Nawab and the Government's dignity still resided in the Nawab and his ministers.
In 1770, during Bengal famine of 1770, a great epidemic of small pox raged in Murshidabad and killing 63,000 of its inhabitants, one of them being Nawab Nazim Saif ud-Daulah, himself. He died on March 10, 1770. His mortal remains lie in the Jafarganj Cemetery in Murshidabad.
He was succeeded by his half-brother, Nawab Nazim Ashraf Ali Khan as the next Nawab.