Mattityahu 12:30-32

Orthodox Jewish Bible

³⁰ The one not with me [Moshiach] is against me [anti-Moshiach]. And the one not gathering with me scatters.

³¹ Therefore, I say to you, every chet (sin) and gidduf (blasphemy) will be forgiven men, but whoever commits Chillul Hashem against the Ruach Hakodesh will not be forgiven.

³² And whoever speaks a word against the Ben HaAdam [Moshiach] will be granted selicha (forgiveness), but whoever speaks against the Ruach Hakodesh, selicha will not be granted him either in the Olam Hazeh or in the Olam Habah.