Some scholars have taken moving creature of the earth, to be one of the signs of ``REJ-AT''.
The Arabic, ``Rej-at'' which means, ``THE RETURN'' is a sure incident which will happen, according to the Shiite Doctrine. This will happen after the advent of Al-Mahdi, and before the Resurrection Day. Thereby a group of believers and a troop of non-believers will return back to life. The believers will then develop to higher ranks in their way of evolution, and the non-believers will be punished severely for their oppressions.
This Return is not general, and for all. It rather is applicable to certain people, specified from both parties.
Jurisprudents say that, the Return is not one of the necessary principles of Shiite; and those who have denied it, have not been excommunicated from the sect.