And he also informed Saul that the judging would be left to God. A lesson we need to be reminded of frequently. God knows every event and every individual, keeping this in his mind, David told Saul that God, who knows all, would be the final judge.
And then David continued with one last thought, evil deeds come from evil people in other words, revengeful and hurtful acts committed against another persons are done by hurtful people.
The way Jesus translated this text in the NT is “Therefore by their fruits ye shall know them” (Matthew 7: 20).
Today in this world, if a Saul chases us, falsely accuses us and lashes out at us, though we long to set the record straight and want to balance the scales, let us remember the words of David to Saul,
May the Lord judge between you and me. And may the Lord avenge the wrongs you have done to me, but my hand will not touch you. As the old saying goes, ‘From evildoers come evil deeds,’ so my hand will not touch you. (I Samuel 24: 12, 13)