1 Samuel 15:2-6

This is what the Lord of armies says: ‘I will punish Amalek for what he did to Israel, in that he obstructed him on the way while he was coming up from Egypt.

Now go and strike Amalek and completely destroy everything that he has, and do not spare him; but put to death both man and woman, child and infant, ox and sheep, camel and donkey.’ ”

Then Saul summoned the people and counted them in Telaim: two hundred thousand foot soldiers and ten thousand men of Judah.

And Saul came to the city of Amalek and set an ambush in the wadi.

But Saul said to the Kenites, “Go, get away, go down from among the Amalekites, so that I do not destroy you along with them; for you showed kindness to all the sons of Israel when they went up from Egypt.” So the Kenites got away from among the Amalekites.