1 Samuel 15:17-19

17Then Samuel said, “Isn’t it true, though you were insignificant in your own eyes, that you were made head of the tribes of Israel? Adonai anointed you king over Israel!

18Then Adonai sent you on a mission and said: ‘Go and utterly destroy the Amalekites, the sinners, and wage war against them until you annihilate them.’

19Why then did you not obey the voice of Adonai, but rushed greedily onto the spoil—doing what was evil in Adonai’s eyes?”