A. The Awaited Mahdi The Messenger of Allah, (صلى الله عليه وآله وسلم) predicted that a time would come when oppression, injustice and aggression would become extremely rampant all over the globe. At that period, a man from the offspring of Muhammad would rise to power over the entire earth, and he would successfully make oppression, injustice and aggression very rare on its surface. 1.   Imam Ahmad (d. 241 H) records the hadith in his Musnad: حدثنا عبد الله حدثني أبي قال الحسن بن