One of the basic tenets of the Jewish faith is the belief in the coming of the Moshiach (Messiah). At this time, the Jewish people will be redeemed, return to their land, and rebuild the Holy Temple under the leadership of a king known as Moshiach (“the anointed one”). Maimonides states1 that one who does not believe in Moshiach, or does not await his coming, denies the validity of the Torah and of our teacher Moses.
https://www.chabad.org/library/article_cdo/aid/1266088/jewish/Moshiach.htm