1 Samuel 15:6-7

15:6 Saul said to the Kenites, “Go on and leave! Go down from among the Amalekites! Otherwise I will sweep you away with them! After all, you were kind to all the Israelites when they came up from Egypt.” So the Kenites withdrew from among the Amalekites.

15:7 Then Saul struck down the Amalekites all the way from Havilah to Shur, which is next to Egypt.