דִּבְרֵי־פִ֭יו אָ֣וֶן וּמִרְמָ֑ה חָדַ֖ל לְהַשְׂכִּ֣יל לְהֵיטִֽיב׃
The words of his mouth are iniquity and deceit; He hath left off to be wise, to do good.
Rashi on Psalms
he refrained from learning to improve He refrained from contemplating to improve his deeds.