1 Samuel 19:4-6

New King James Version

⁴ Thus Jonathan ^(A)spoke well of David to Saul his father, and said to him, “Let not the king ^(B)sin against his servant, against David, because he has not sinned against you, and because his works have been very good toward you. ⁵ For he took his ^(C)life in his hands and ^(D)killed the Philistine, and ^(E)the Lord brought about a great deliverance for all Israel. You saw it and rejoiced. ^(F)Why then will you ^(G)sin against innocent blood, to kill David without a cause?”

⁶ So Saul heeded the voice of Jonathan, and Saul swore, “As the Lord lives, he shall not be killed.”