1 Samuel 15:16-19

16And Samuel said to Saul, Stay, that I may tell thee what Jehovah has said to me this night. And he said to him, Say on.

17And Samuel said, Was it not when thou wast little in thine eyes that thou [becamest] the head of the tribes of Israel, and Jehovah anointed thee king over Israel?

18And Jehovah sent thee on a way and said, Go and utterly destroy the sinners the Amalekites, and fight against them until they be consumed.

19Why then didst thou not hearken to the voice of Jehovah, but didst fall upon the spoil, and didst evil in the sight of Jehovah?