1 Samuel 19:4-6

When Jonathan talked to Saul his father, he said good things about David. Jonathan said, “The king should do no wrong to your servant David since he has done nothing wrong to you. What he has done has helped you greatly. David risked his life when he killed Goliath the Philistine, and the LORD won a great victory for all Israel. You saw it and were happy. Why would you do wrong against David? He’s innocent. There’s no reason to kill him!” Saul listened to Jonathan and then made this promise: “As surely as the LORD lives, David won’t be put to death.”