1 Samuel 16
But Saul and the people spared Agag and the best of the sheep, the oxen, the fatlings, the lambs, and all that was good, and were unwilling to utterly destroy them. But everything despised and worthless, that they utterly destroyed.
Now the word of the Lord came to Samuel, saying, “I greatly regret that I have set up Saul as king, for he has turned back from following Me, and has not performed My commandments.”
And Saul said to Samuel, “But I have obeyed the voice of the Lord, and gone on the mission on which the Lord sent me, and brought back Agag king of Amalek; I have utterly destroyed the Amalekites. But the people took of the plunder, sheep and oxen, the best of the things which should have been utterly destroyed, to sacrifice to the Lord your God in Gilgal.”
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So Samuel said:
“Has the Lord as great delight in burnt offerings and sacrifices,
As in obeying the voice of the Lord?
Behold, to obey is better than sacrifice,
And to heed than the fat of rams.
For rebellion is as the sin of witchcraft,
And stubbornness is as iniquity and idolatry.
Because you have rejected the word of the Lord,
He also has rejected you from being king.”