1st Samuel 15:5

2 Thus saith Jehovah of hosts, I have marked that which Amalek did to Israel, how he set himself against him in the way, when he came up out of Egypt.

3 Now 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 ass.

4 And Saul summoned the people, and numbered them in Telaim, two hundred thousand footmen, and ten thousand men of Judah.

5 And Saul came to the city of Amalek, and laid wait in the valley.

6 And Saul said unto the Kenites, Go, depart, get you down from among the Amalekites, lest I destroy you with them; for ye showed kindness to all the children of Israel, when they came up out of Egypt. So the Kenites departed from among the Amalekites.

7 And Saul smote the Amalekites, from Havilah as thou goest to Shur, that is before Egypt.

8 And he took Agag the king of the Amalekites alive, and utterly destroyed all the people with the edge of the sword.