1 Samuel 15:17-19

Samuel said, “Is it not true, though you were little in your own eyes, you were made the head of the tribes of Israel? And the LORD anointed you king over Israel, and the LORD sent you on a mission, and said, ‘Go and utterly destroy the sinners, the Amalekites, and fight against them until they are exterminated.’ Why then did you not obey the voice of the LORD, but rushed upon the spoil and did what was evil in the sight of the LORD?”