Psalms 64:3-6

Who sharpen their tongue like a sword, And bend their bows to shoot their arrows—bitter words, That they may shoot in secret at the blameless; Suddenly they shoot at him and do not fear. They encourage themselves in an evil matter; They talk of laying snares secretly; They say, “Who will see them?” They devise iniquities: “We have perfected a shrewd scheme.” Both the inward thought and the heart of man are deep.