GAL 1:8

8 But even if we or a malach from Shomayim should pose as maggidim [for Moshiach] and make a hachrazah [(proclamation)] to you of a “Besuras HaGeulah” other than that Besuras HaGeulah which we preached to you, let such a one be ARUR HAISH[(Cursed is the man)] and set under cherem [(ban of destruction)] and onesh Gehinnom [(damnation)].