1 Samuel 19:4-5

4Then Jonathan spoke well of David to his father Saul and said to him, “The king should not sin against his servant David; he has not sinned against you. In fact, his actions have been highly beneficial to you. 5He took his life in his hands when he struck down the Philistine, and the LORD worked a great salvation for all Israel. You saw it and rejoiced, so why would you sin against innocent blood by killing David for no reason?”