Al Khafif was the ruler of Mansurah in Sindh. He set up the Soomro dynasty which was the Abbasid Caliphate's functionary in Sindh until the Siege of Baghdad (1258). He was sent from "Samarra" by the Abbasid Caliphate and thus became known as Khafif Soomera in Sindh.
- History of Pakistan: Pakistan through ages by Ahmad Hasan Dani, Sang-e Meel Publications, 2007, Page 218
- Siddiqui, Habibullah. "The Soomras of Sindh: their origin, main characteristics and rule – an overview (general survey) (1025 – 1351 AD)" (PDF). Literary Conference on Soomra Period in Sindh.
- Souvenir, Mansura Seminar: 12th Rabi-us-Sani, 1403 A.H./27 January 1983 A.D ʻAbdullāh Varyāh, Sanghar Historical and Cultural Society (Pakistan). Sanghar Historical and Cultural Society, 1983
- Pakistan the Culture By Carolyn Black Published by Crabtree Publishing Company, Page 8