The Chachnāma (Fatḥnāma-yi Sind) 173: The Garrison capitulates.

173

Then they came down from the ramparts and agreed with each other that on these terms they would open the gate and stand at it till Muhammad Kasim should come. They said that if he would act according to his promise, and would treat them generously, they would submit to him and serve him, without any excuse. Then they took the keys of the fort in their hands and stood before the gate, and the officers of Hajjaj, who had been selected, came forward; the garrison opened the gate and made their submission.