The Chachnāma (Fatḥnāma-yi Sind) 32.10

32.10

Every day their power and grandeur will go on increasing, and under your very eyes your subjects will, out of fear, beg for mercy from the Arabs, and to save their lives and property they will be obliged to find some other shelter. So it is best for you to let them be on the western side of the river, and let the Mehrán serve as a screen between us and them. We must not in any way consider their coming over to this side of the river as a good thing. You should order the boatmen on the river and Jats and other country tribes on the plains to watch them, and to stop the roads by which they get supplies of provisions for the army, like grass and grain and firewood; and to seize these articles wherever they find them, and to molest the stragglers of their army, who may separate themselves from the main body. In this way their ranks will be thinned. Some of them may die of hunger, and some of want of clothes and other necessaries of life. Their horses will have no grass, and their horsemen no money, and so they will be reduced to straits and be dispersed, and they will no more trespass on your kingdom. When their hordes are scattered and dispersed, your country need have no fear and you yourself will be safe.”