Numbers 10:30

Then Moses let his father-in-law depart, and he went his way into his own land.

Now the sons of the Kenite, Moses’ father-in-law, went up from the city of palms with the sons of Judah, to the wilderness of Judah which is in the south of Arad; and they went and lived with the people.

And Saul said to the Kenites, “Go, depart; go down from among the Amalekites, lest I destroy you with them; you showed lovingkindness to all the sons of Israel when they came up from Egypt.” So the Kenites departed from among the Amalekites.