The History of Shēr Shāh (Tārīkh-i Shērshāhī) 3.14.6

3.14.6

Subsequently, Haibat Khan Niazi, Jalal Khan Jalu, Sarmast Khan Sarwani, and other chiefs were sent against Bahraich, and they drove out the Mughals from those parts until they arrived at and captured the city of Sambhal, and made slaves of the inhabitants, and spoiled the city. Another force was sent towards Jaunpur, the governor of which place was killed in battle, and the same force was then sent in the direction of Agra. Every governor on the part of the Emperor Humayun, throughout the whole country, who offered any opposition, was killed, or was defeated and driven out of the country; so that all the districts as far as Kanauj and Sambhal fell into the possession of the Afghans. Sher Khan also sent Khawas Khan against the city of Maharta, zamindar, with orders to cut down his jungle fastness, and to capture him. The officers of Sher Khan also collected the revenue of both the autumn and spring harvests of these parts. When the Emperor heard that Mirza Hindal had slain Shaikh Bahlol, and excited a sedition in the neighbourhood of Agra, he became distracted, and started from Bengal (as the heat of the season had somewhat abated) towards Agra. Sher Khan, summoning all his forces from Bihar, Jaunpur, and other places, excepting only the division with Khawas Khan acting against Maharta, collected them in the environs of the fort of Rohtas.