Musannaf Ibn Abi Shaybah 40440 — Reports on the tribulation

It is narrated from Mujahid that he said: The Mahdi is Isa Ibn Maryam (peace be upon him). (Note: In this report Isa is called the Mahdi. This does not negate the Mahdi whose name is Muhammad bin Abdullah, because Isa is among the rightly guided and the group of prophets who have infallibility and lofty rank, so his being called Mahdi is in the linguistic sense. Otherwise, that Isa and the Mahdi are two separate persons is established, as clear as broad daylight, by countless authentic and mutawatir hadiths.)