1 Samuel 15:3-9
English Standard Version
4So Saul summoned the people and numbered them in Telaim, two hundred thousand men on foot, and ten thousand men of Judah.
5And Saul came to the city of Amalek and lay in wait in the valley.
6Then Saul said to the Kenites, "Go, depart; go down from among the Amalekites, 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 Kenites departed from among the Amalekites.
7And Saul defeated the Amalekites from Havilah as far as Shur, which is east of Egypt.
8And he took Agag the king of the Amalekites alive and devoted to destruction all the people with the edge of the sword.
9But Saul and the people spared Agag and the best of the sheep and of the oxen and of the fattened calves and the lambs, and all that was good, and would not utterly destroy them. All that was despised and worthless they devoted to destruction.