Mattityahu 12:32-34

Orthodox Jewish Bible

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.

³⁴ You banim of nechashim (sons of snakes), how are you able to speak tovot (good things), for out of the abundance of the lev (heart) the mouth speaks.