Psalms 52:4 Kabbalah

הַ֭וּוֹת תַּחְשֹׁ֣ב לְשׁוֹנֶ֑ךָ כְּתַ֥עַר מְ֝לֻטָּ֗שׁ עֹשֵׂ֥ה רְמִיָּֽה׃

Thy tongue deviseth destruction; Like a sharp razor, working deceitfully.

Read kabbalistic (mystical) interpretation of Psalms 52:4: and classical mystical sources.