1 Samuel 19:4-5

4Then Jonathan 1spoke well of David to Saul his father and said to him, “2Do not let the king sin against his servant David, since he has not sinned against you, and since his deeds have been very 3beneficial to you.

5For 4he took his life in his hand and struck the Philistine, and 5the Lord brought about a great deliverance for all Israel; you saw it and rejoiced. 6Why then will you sin against innocent blood by putting David to death without a cause?”