4 And Jonathan spoke good of David to Saul his father, and said to him, Let not the king sin against his servant, against David, because he has not sinned against thee; for also what he did was very advantageous to thee; 5 for he put his life in hand, and smote the Philistine, and Jehovah wrought a great salvation for all Israel: thou didst see [it], and didst rejoice; why then wilt thou sin against innocent blood, in slaying David without cause? 6 And Saul hearkened to the voice of Jonathan, and Saul swore, [As] Jehovah liveth, he shall not be put to death!
Matthew Henry's Commentary on 1 Samuel 19:4-6
Commentary on 1 Samuel 19:1-10
(Read 1 Samuel 19:1-10)
How forcible are right words! Saul was, for a time, convinced of the unreasonableness of his enmity to David; but he continued his malice against David. So incurable is the hatred of the seed of the serpent against that of the woman; so deceitful and desperately wicked is the heart of man without the grace of God, Jeremiah 17:9.