וּבְנֵ֣י קֵינִי֩ חֹתֵ֨ן מֹשֶׁ֜ה עָל֨וּ מֵעִ֤יר הַתְּמָרִים֙ אֶת־בְּנֵ֣י יְהוּדָ֔ה מִדְבַּ֣ר יְהוּדָ֔ה אֲשֶׁ֖ר בְּנֶ֣גֶב עֲרָ֑ד וַיֵּ֖לֶךְ וַיֵּ֥שֶׁב אֶת־הָעָֽם׃
And the children of the Kenite, Moses’ father-in-law, went up out of the city of palm-trees with the children of Judah into the wilderness of Judah, which is in the south of Arad; and they went and dwelt with the people.
Zohar
Our verse continues: “And Saul said to the Kenite.” The Kenite, as we know, was Jethro. Now, how came the descendants of Jethro to have their abode alongside of Amalek? Was not Jericho their home? But the explanation is found in the verse: “And the children of the Kenite, Moses’ father-in-law, went up out of the city of palm-trees (i.e. Jericho) with the children of Judah into the wilderness of Judah” (Judges 1, 16); that is to say, when they left Jericho, they moved on as far as the border of Amalek, where they settled and remained until the time of King Saul, when, as we read, “the Kenites departed from among the Amalekites” (I Sam. 15, 6).