5. Come and look at the verse, "and Saul said to the Kenite" (I Shmuel 15:6). Who is the Kenite? It is Jethro. HE ASKS: Who placed the children of Jethro in here, to dwell in Amalek, their abode being in Jericho; AND ANSWERS: it is written "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" (Shoftim 1:16). And when they moved from there, they dwelt in the territory of Amalek until that time when King Saul came and removed the Kenite from Amalek.
5. ת"ח, מָה כְּתִיב, וַיֹּאמֶר שָׁאוּל אֶל הַקֵּנִי. מַאן קֵנִי. דָּא יִתְרוֹ. וְכִי מַאן יָהִיב בְּנֵי יִתְרוֹ הָכָא, לְמֶהֱוֵי דִּיּוּרֵיהוֹן בַּעֲמָלֵק, וְהָא בִּירִיחוֹ הֲווֹ שַׁרְיָין. אֶלָּא הָא כְּתִיב, וּבְנֵי קֵנִי חֹתֵן מֹשֶׁה עָלוּ מֵעִיר הַתְּמָרִים אֶת בְּנֵי יְהוּדָה מִדְבָּר יְהוּדָה וְגוֹ'. וְכַד עָלוּ מִתַּמָּן, שָׁרוּ בִּתְחוּמָא דַּעֲמָלֵק, עַד הַהוּא זִמְנָא דְּאָתָא שָׁאוּל מַלְכָּא, דִּכְתִּיב וַיָּסַר קֵנִי מִתּוֹךְ עֲמָלֵק.