1 Samuel 24:7

So David checked his men with these words, and suffered them not to rise against Saul. And Saul rose up out of the cave, and went on his way.

If I have rewarded evil unto him that was at peace with me; (Yea, I have delivered him that without cause was mine adversary;)

and blessed be thy discretion, and blessed be thou, that hast kept me this day from bloodguiltiness, and from avenging myself with mine own hand.

but I say unto you, love your enemies, and pray for them that persecute you;

Render to no man evil for evil. Take thought for things honorable in the sight of all men.

Treasury of Scripture Knowledge

So David stayed his servants with these words, and suffered them not to rise against Saul. But Saul rose up out of the cave, and went on his way.

If I have rewarded evil unto him that was at peace with me; (Yea, I have delivered him that without cause was mine adversary;)

but I say unto you, love your enemies, and pray for them that persecute you;

Render to no man evil for evil. Take thought for things honorable in the sight of all men.

and blessed be thy discretion, and blessed be thou, that hast kept me this day from bloodguiltiness, and from avenging myself with mine own hand.