Rashi on Psalms
Why did a wicked man blaspheme the Holy One, blessed be He? Because he said in his heart that You do not seek.
Radak on Psalms
Wherefore doth the wicked contemn God, (And) say in his heart, Thou wilt not require ? – For why is he despising Thee ? Only because he says in his heart that Thou wilt not require, nor regard what he says and does.