Psalms 64:6 KJV
They search out iniquities; they accomplish a diligent search: both the inward thought of every one of them, and the heart, is deep.
Psalms 64:6, King James Version
In context
5 They encourage themselves in an evil matter: they commune of laying snares privily; they say, Who shall see them?
6 They search out iniquities; they accomplish a diligent search: both the inward thought of every one of them, and the heart, is deep.
7 But God shall shoot at them with an arrow; suddenly shall they be wounded.