'Blood thirsty' in the Bible

But you, God, bring them down to the Pit of corruption; bloodthirsty and deceitful people will not live out half their days. But I put my full confidence in you. To the Director: A special Davidic psalm to the tune of "A Silent Dove Far Away," when the Philistines seized him in Gath.

Save me from those who practice evil; deliver me from bloodthirsty men.

Bloodthirsty men hate the innocent person, but the upright show concern for his life.