כִּ֤י יְאַלֵּ֣ף עֲוֺנְךָ֣ פִ֑יךָ וְ֝תִבְחַ֗ר לְשׁ֣וֹן עֲרוּמִֽים׃
For thine iniquity teacheth thy mouth, And thou choosest the tongue of the crafty.
Rashi on Job
For your iniquity teaches Your evil inclination [teaches] your mouth to speak such words, but you should have chosen the tongue of the crafty.