(The arrival of Imam Mahdi)

`Abdallah b. Mas'ud reported God's messenger as saying, "The world will not pass away before the Arabs are ruled by a man of my family whose name will be the same as mine.' Tirmidhi and Abu Dawud transmitted it. In a version by the latter he said, "If only one day of this world remained God would lengthen that day till He raised up in it a man who belongs to me (or, to my family) whose name is the same as mine and whose fathers name is the same as my father's, who will fill the earth with equity and justice as it has been filled with oppression and tyranny." Aba Dawud transmitted it.