1st Samuel 15:5

2 Thus 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.

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 gathered the people together, and numbered them in Telaim, two hundred thousand footmen, and ten thousand men of Judah.

5 And Saul came to a 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 shewed 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 until thou comest to Shur, that is over against Egypt.

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