 They overran the territory of Najib ud-Daulah, acquiring from him a tribute of eleven lakh of rupees ( 1,100,000).In April 1775, Singh with two other sardars, Rai Singh Bhangi and Tara Singh Ghaiba, crossed the Yamuna river to occupy land ruled by Zabita Khan, the son and successor of Najib-Ud-Daulah.In desperation, Zabita Khan offered Singh large sums of money and proposed an alliance to jointly plunder the crown lands.