151 And Samuel said to Saul, "The Lord sent me to anoint you king over his people Israel; now therefore hearken to the words of the Lord. 2 Thus says the Lord of hosts, 'I will punish what Am'alek did to Israel in opposing them on the way, when they came up out of Egypt. 3 Now go and smite Am'alek, and utterly destroy all that they have; do not spare them, but kill both man and woman, infant and suckling, ox and sheep, camel and ass.'" 4 So Saul summoned the people, and numbered them in Tela'im, two hundred thousand men on foot, and ten thousand men of Judah. 5 And Saul came to the city of Am'alek, and lay in wait in the valley. 6 And Saul said to the Ken'ites, "Go, depart, go down from among the Amal'ekites, lest I destroy you with them; for you showed kindness to all the people of Israel when they came up out of Egypt." So the Ken'ites departed from among the Amal'ekites. 7 And Saul defeated the Amal'ekites, from Hav'ilah as far as Shur, which is east of Egypt. 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 15:1-9
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.