Receive glad tidings! By Allah, I fear for you from abundance of wealth more than I fear for you from scarcity. By Allah, this matter [Islam] will continue among you until the lands of Persia, Rome, and Himyar will be conquered for you, and you will become three armies: an army in as-Sham, an army in Iraq, and an army in Yemen; until a man is given a hundred dinars and remains dissatisfied.