1 Samuel 15:2-9

2Thus saith the LORD of hosts, I remember that which Amalek did to Israel, how he laid wait for him in the way, when he came up from Egypt. 3Now go and smite Amalek, and utterly destroy all that they have, and spare them not; but slay both man and woman, infant and suckling, ox and sheep, camel and donkey. 4And Saul gathered the people together, and numbered them in Telaim, two hundred thousand footmen, and ten thousand men of Judah. 5And Saul came to a city of Amalek, and laid wait in the valley.1 6And Saul said to the Kenites, Go, depart, withdraw yourselves from among the Amalekites, lest I destroy you with them: for ye showed kindness to all the children of Israel, when they came up from Egypt. So the Kenites departed from among the Amalekites. 7And Saul smote the Amalekites from Havilah until thou comest to Shur, that is east of Egypt. 8And he took Agag the king of the Amalekites alive, and utterly destroyed 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 fatlings, and the lambs, and all that was good, and would not utterly destroy them: but every thing that was vile and refuse, that they destroyed utterly.2