Deuteronomy 17:15-17

Darby Translation

¹⁵ thou shalt only set him king over thee whom Jehovah thy God 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.

¹⁶ Only he shall not multiply horses to himself, nor lead back the people to Egypt, to multiply horses; for Jehovah hath said unto you, Ye shall not return again any more that way.

¹⁷ Neither shall he multiply wives to himself, that his heart turn not away; neither shall he greatly multiply to himself silver and gold.