Deuteronomy 17:14-15

14When thou comest unto the land which Jehovah thy 1God giveth thee, and shalt possess it, and shalt dwell therein, and shalt say, I will set a king over me, like all the nations that are about me;

15thou shalt only set him king over thee whom Jehovah thy 2God will choose: from among thy brethren shalt thou set a king over thee; thou mayest not set a foreigner over thee, who is not thy brother.