"‘Abbad, son of Ziyad, then made war on the frontier of Hind by way of Sijistan. He went to Sanaruz, from whence he proceeded by way of Khaz to Ruzbar in Sijistan on the banks of the Hind-mand. Then he descended to Kish, and crossing the desert came to Kandahar. He fought the inhabitants, routed them, put them to flight and subdued the country; but many Musulmans perished. ‘Abbad observed the high caps of the people of that country, and had some made like them, which he called Abbadiya."
January 1, 1970
https://en.wikiquote.org/wiki/Al-Baladhuri