2 Samuel 19:21-23

But Abishai the son of Zeruiah answered and said, Shall not Shimei be put to death for this, because he cursed the LORD'S anointed?

And David said, What have I to do with you, ye sons of Zeruiah, that ye should this day be adversaries unto me? shall there any man be put to death this day in Israel? for do not I know that I am this day king over Israel?

Therefore the king said unto Shimei, Thou shalt not die. And the king sware unto him.