The Chachnāma (Fatḥnāma-yi Sind) 46.1.4

46.1.4

He also advised all of them to assist one another, in case an enemy’s army invaded the country, or caused disaffection or revolt among the people. They were further instructed to keep an eye on the unruly and the mischievous, and to chastise them. He gave them 2,000 infantry for the purpose. He also nominated Kais Abdul Malik, son of Kais Déni and Khalid Ansári to the charge of Siwistán; and deputed Masúd Tamími son of Shaibah Jadidi, Farasat Atki, Sahir Lashkari, Abdul Malik son of Abdullah Khazai, Mahni son of Akkah, and Wafd son of Abdurrahman to Dahlelah and Nerin to settle that part of the country. Among the emancipated slaves, there was one by name Malik, who was very enterprising. Him, he sent as his officer to Kardail. Alwan Bahkri and Kais son of Saalabah with 300 followers of theirs chose to become permanent residents. They married and begot children, and completely subjugated and tamed the Jats.