C. F. Keil and Franz Delitzsch on 1 Samuel 24:12-13

1Sa 24:12-13

After he had proved to the king in this conclusive manner that he had no reason whatever for seeking his life, he invoked the Lord as judge between him and his adversary: “Jehovah will avenge me upon thee, but my hand will not be against thee. As the proverb of the ancients (הקּדמוני is used collectively) says, Evil proceedeth from the evil, but my hand shall not be upon thee.” The meaning is this: Only a wicked man could wish to avenge himself; I do not.