8 He took Agag, king of the Amalekites, prisoner, and put all the people to the sword without mercy. 9 But Saul and the people did not put Agag to death, and they kept the best of the sheep and the oxen and the fat beasts and the lambs, and whatever was good, not desiring to put them to the curse: but everything which was bad and of no use they put to the curse.
Matthew Henry's Commentary on 1 Samuel 15:8-9
Commentary on 1 Samuel 15:1-9
(Read 1 Samuel 15:1-9)
The sentence of condemnation against the Amalekites had gone forth long before, Revelation 18:4. As the commandment had been express, and a test of Saul's obedience, his conduct evidently was the effect of a proud, rebellious spirit. He destroyed only the refuse, that was good for little. That which was now destroyed was sacrificed to the justice of God.