1st Samuel 13:13-14

And Samuel said to Saul, Thou hast done follily, and thou hast not kept the behests of thy Lord God, which he commanded to thee; and if thou haddest not done this thing, right now the Lord had made ready thy realm upon Israel without end; but thy realm shall not rise further. The Lord hath sought a man to himself after his heart; and the Lord hath commanded to him, that he should be duke on his people, for thou keptest not those things which the Lord commanded.