The Chachnāma (Fatḥnāma-yi Sind) 27: Chach proceeds to Armabel and fixes the revenue.

27

From that place he returned to Armabel, and having passed through the country of Turan, he came out in the desert. No body arose to fight with him. He arrived in the country of Kandhabel, that is, Kandahr; and having traversed that desert also, he advanced to the fort. The people took refuge in it. When he arrived at the banks of the Sini, he pitched his tents there. The people of the place being much pressed agreed to pay him an annual tribute of one hundred thousand dirams, and one hundred hill horses. A treaty was made, and Chach returned to his capital Alor, and remained there till he died and went to hell. He reigned forty years.