6 And Saul said to the Kenites, Go away, take yourselves out from among the Amalekites, or destruction will overtake you with them: for you were kind to the children of Israel when they came out of Egypt. So the Kenites went away from among the Amalekites.
Matthew Henry's Commentary on 1 Samuel 15:6
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.