8 And he took Agag the king of the Amal'ekites 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 and of the oxen and of the fatlings, and the lambs, and all that was good, and would not utterly destroy them; all that was despised and worthless they utterly destroyed.
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.