Halakhah zu Tehillim 73:9

(See the end of this preface and my book Shmirath Halashon [Guarding One's Tongue], where we have transcribed all the relevant citations from the Talmud, the Midrash, and the holy Zohar. If one scrutinizes them carefully, the hairs of his head will stand on end!)

And we can say that this is the intent of the aforementioned Gemara in Arachin, viz.: "All who speak lashon hara magnify transgression until the heavens, as it is written (Tehillim 73:9): 'They set their mouth in the heavens, and their tongue walks the earth.'" That is, even though his tongue walks the earth, he sets his mouth against Heaven. And thus do we find it in Tanna d'bei Eliyahu (Rabbah Zuta 18) — that the lashon hara that he speaks rises against the Throne of Glory. We can hereby derive some idea of the greatness of the destruction wrought against Israel by the "men of the tongue."