1 Samuel 19:4-5

4So Jonathan spoke well of David to his father Saul. “You should not commit a sin against your servant David,” he said. “He hasn’t sinned against you. Instead, he has done some very fine things for you:

5He risked his life and killed the Philistine Goliath, and the Lord gave all Israel a great victory. When you saw it, you rejoiced. Why then should you sin by shedding David’s innocent blood for no reason?”