Psalms 64:3-6

³(64-4) Who have whet their tongue like a sword, and have aimed their arrow, a poisoned word;

⁴(64-5) That they may shoot in secret places at the blameless; suddenly do they shoot at him, and fear not.

⁵(64-6) They encourage one another in an evil matter; they converse of laying snares secretly; they ask, who would see them.

⁶(64-7) They search out iniquities, they have accomplished a diligent search; even in the inward thought of every one, and the deep heart.