Deuteronomy 17:14-15

When thou art come unto the land which the LORD thy God giveth thee, and shalt possess it, and shalt dwell therein, and shalt say, I will set a king over me, like as all the nations that {are} about me; Thou shalt in any wise set {him} king over thee, whom the LORD thy God shall choose: {one} from among thy brethren shalt thou set king over thee: thou mayest not set a stranger over thee, which {is} not thy brother.