1 Samuel 15:18-22

And the Lord sent you on a mission, and said, ‘Go and completely destroy the sinners, the Amalekites, and fight against them until they are eliminated.’

Why then did you not obey the voice of the Lord? Instead, you loudly rushed upon the spoils and did what was evil in the sight of the Lord!”

Then Saul said to Samuel, “I did obey the voice of the Lord, for I went on the mission on which the Lord sent me; and I have brought Agag the king of Amalek, and have completely destroyed the Amalekites.

But the people took some of the spoils, sheep and oxen, the choicest of the things designated for destruction, to sacrifice to the Lord your God at Gilgal.”

Samuel said, “Does the Lord have as much delight in burnt offerings and sacrifices As in obeying the voice of the Lord? Behold, to obey is better than a sacrifice, And to pay attention is better than the fat of rams.