4 Jonathan brought up David with his father, speaking well of him. "Please," he said to his father, "don't attack David. He hasn't wronged you, has he? And just look at all the good he has done! 5 He put his life on the line when he killed the Philistine. What a great victory God gave Israel that day! You were there. You saw it and were on your feet applauding with everyone else. So why would you even think of sinning against an innocent person, killing David for no reason whatever?" 6 Saul listened to Jonathan and said, "You're right. As God lives, David lives. He will not be killed."
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.