7 And Saul attacked the Amalekites, from Havilah all the way to Shur, which is east of Egypt. 8 He also took Agag king of the Amalekites alive, and utterly destroyed all the people with the edge of the sword. 9 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.
Matthew Henry's Commentary on 1 Samuel 15:7-9
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.