Al-Baladhuri, Ahmad ibn Jabir. The Origins of the Islamic State, Part I. Trans. Philip Khuri Hitti. New York: Columbia University, 1916.
"Extract From a Chronicle Composed About AD 640." The Seventh Century in the West-Syrian Chronicles. Trans. Andrew Palmer. Liverpool: Liverpool University Press, 1993. ISBN 0-85323-238-5
Le Strange, Guy. Palestine Under the Moslem: A Description of Syria and the Holy Land, From A.D. 650 to 1500. London: A. P. Watt, 1890.
Al-Tabari, Abu Ja'far Muhammad ibn Jarir. The History of al-Tabari, Volume XI: The Challenge to the Empires. Trans. Khalid Yahya Blankinship. Ed. Ehsan Yar-Shater. Albany, NY: State University of New York Press, 1993. ISBN 0-7914-0851-5
