Psalm 55:20-23

My companion laid hands on a friend and violated a covenant with me with speech smoother than butter, but with a heart set on war; with words that were softer than oil, but in fact were drawn swords.
Cast your burden on the Lord, and he will sustain you; he will never permit the righteous to be moved.
But you, O God, will cast them down into the lowest pit; the bloodthirsty and treacherous shall not live out half their days. But I will trust in you.