1 Samuel 15:6-7

6 Then he said to the Kenites, “Go away, leave the Amalekites so that I do not destroy you along with them; for you showed kindness to all the Israelites when they came up out of Egypt.” So the Kenites moved away from the Amalekites.
7 Then Saul attacked the Amalekites all the way from Havilah to Shur, near the eastern border of Egypt.