1 Samuel 19:4-5

4Jonathan spoke to his father Saul. He said good things about David. He said to Saul, ‘The king should not do anything bad against David. David is your servant. He has not done anything that is bad against you. Everything that he does really helps you.

5David was not afraid to die when he fought against the Philistine, Goliath. When David killed Goliath, the Lord helped Israel to win a great battle. When you saw it, you were very happy. So why do you now want to kill David? He is not guilty of anything that is wrong. You have no reason to kill him.’