Razeen Abdullah's(RZ) report -The ProphetPBUH said ,"even if one day was left for the end of this world, Allah would prolong that day, so that a person from my family (Ahl-e-Bait) would be deputed, whose name would be my name and whose father's name would be my father's name".
By- Abu Da'udNOTE:
It is written even if one day was left for the end of this world, Allah would prolong that day and IMAM MAHDI would be from the family of PROPHET MUHAMMED(saas)