Psalmów 12:5 Kabała: Sha'arei Kedusha

Evil speech is a quality about which our sages, of blessed memory, stated,⁵²³Talmud Bavli, Arachin 16b; Mishneh Torah, Hilchot De’ot 7:3 “There are three transgressions that bring retribution against the one who perpetrates them in this world and disinherit him from a share in the coming world. These are idolatry, forbidden relations, and murder, but evil speech outweighs them all.” Our sages, of blessed memory, also stated,⁵²⁴Talmud Bavli, Arachin 15b “Whoever speaks with an evil tongue denies the fundamental principle of the existence of HaShem-יהו״ה, blessed is He, as written,⁵²⁵Psalms 12:5 ‘Those who said, ‘Because of our tongues we shall prevail, our lips are with us, who is master over us?’’”