1 Samuel 15:4-6

4So Saul summoned the troops and numbered them at Telaim—200,000 foot soldiers and 10,000 men of Judah. 5Saul came to the city of Amalek and lay in wait in the valley. 6And he warned the Kenites, “Since you showed kindness to all the Israelites when they came up out of Egypt, go on and get away from the Amalekites. Otherwise I will sweep you away with them.”

So the Kenites moved away from the Amalekites.