1 Samuel 15:16-18

16“Stop!” exclaimed Samuel. “Let me tell you what the Lord said to me last night.” “Tell me,” he replied.

17Samuel continued, “Although you once considered yourself unimportant, haven’t you become the leader of the tribes of Israel? The Lord anointed you king over Israel

18and then sent you on a mission and said, ‘Go and completely destroy the sinful Amalekites. Fight against them until you have annihilated them.’