Mattityahu 12:31-33

Orthodox Jewish Bible

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.

³³ Either make the etz (tree) tov (good) and its pri (fruit) will be tov, or make the etz nishchat (corrupt) and its pri will be rah; for by its pri the etz is known.