the end of time

On The Coming Of The Mahdi ( ) At The End Of Times

The Coming of the Mahdi (peace upon him) is narrated from many Companions and the hadiths about the Mahdi are so numerous, that many of the Ulema consider the topic to be mutawatir in meaning, i.e. mass-transmitted and not possibly invented, so there is no doubt about it.

https://www.livingislam.org/comahdi_e.html

When the time is ripe, Allah will send al-Mahdi (AS). One of his distinguishing traits will be that he will be a righteous 'king' or 'rule by kingship', and fill the earth with justice and equity just as it had been filled with oppression and injustice.