1 Samuel 15:19

15Saul said, “They have brought them from the Amalekites; for the people spared the best of the sheep and of the cattle, to sacrifice to the LORD your God. We have utterly destroyed the rest.”

16Then Samuel said to Saul, “Stay, and I will tell you what the LORD said to me last night.” He said to him, “Say on.”

17Samuel said, “Though you were little in your own sight, weren’t you made the head of the tribes of Israel? The LORD anointed you king over Israel;

18and the LORD sent you on a journey, and said, ‘Go, and utterly destroy the sinners the Amalekites, and fight against them until they are consumed.’

19Why then didn’t you obey the LORD’s voice, but took the plunder, and did that which was evil in the LORD’s sight?”

20Saul said to Samuel, “But I have obeyed the LORD’s voice, and have gone the way which the LORD sent me, and have brought Agag the king of Amalek, and have utterly destroyed the Amalekites.

21But the people took of the plunder, sheep and cattle, the best of the devoted things, to sacrifice to the LORD your God in Gilgal.”

22Samuel said, “Has the LORD as great delight in burnt offerings and sacrifices, as in obeying the LORD’s voice? Behold, to obey is better than sacrifice, and to listen than the fat of rams.

23For rebellion is as the sin of witchcraft, and stubbornness is as idolatry and teraphim. Because you have rejected the LORD’s word, he has also rejected you from being king.”