Parsons, Rule of Empires, p. 77; Bonner, Jihad in Islamic History, p. 89; Hodgson, Venture of Islam, 1. p. 305
921
Aziz Al-Azmeh, Muslim Kingship: Power and the Sacred in Muslim Christian and Pagan Politics (London and New York, 1997), p. 239; Hodgson, Venture of Islam, 1, pp. 444–45
