1 Samuel 15:1-9

Samuel said to Saul, “The Lord sent me to anoint you king over His people Israel. Now listen and pay close attention to the words of the Lord. Thus says the LORD of hosts (armies), ‘I will punish Amalek for what he did to Israel, how he set himself against him on the way when Israel came up from Egypt. Now go and strike Amalek and completely destroy everything that they have; do not spare them, but kill both man and woman, child and infant, ox and sheep, camel and donkey.’ ” So Saul summoned the people and numbered them at Telaim—200,000 foot soldiers and 10,000 men of Judah. Saul came to the city of Amalek and set an ambush in the valley. Saul said to the Kenites, “Go, leave, go down from the Amalekites, so that I do not destroy you along with them; for you showed kindness to all the Israelites when they went up from Egypt.” So the Kenites departed from among the Amalekites. Saul defeated the Amalekites, from Havilah as far as Shur, which is east of Egypt. He captured Agag the king of the Amalekites alive, though he totally destroyed all [the rest of] the people with the sword. Saul and the people spared Agag and the best of the sheep, the oxen, the fatlings, the lambs, and everything that was good, and they were not willing to destroy them entirely; but everything that was undesirable or worthless they destroyed completely.