The Caliphate: Its Rise, Decline, and Fall : from Original Sources

Abu Bekr already amongst Amru answered appointed Arab Arabia arms army attack Bagdad battle Bedouin blood body brother brought Bussorah Byzantine Caliph called camp campaign carried cast cause charge chief Chosroes Christian citizens close column command court cried crossed Damascus danger death defeated despatched East Egypt empire enemy faith fell field fight followed force gained gathered gave given governor Greeks ground hand head held Irac Islam joined Khalid Kufa land leader leave Lord Mahomet Mecca Medina months Moslem Mothanna Muavia numbers Omar once Othman passed Persian prayer prisoners Prophet provinces reached received reign remained replied retired returned river rule sent side slain soon strong success sword Syria taken thee thou throughout took tribes troops turned victory whole