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.
Saul told the Kenites to leave the Amalekites and not be destroyed with them. He said this because the Kenites had been kind to the Israelites after they left Egypt. The Kenites then left the Amalekites.