Deuteronomy 17:15-16

15you shall surely set a king over you whom the Lord your God chooses, one 1from among your 2countrymen you shall set as king over yourselves; you may not put a foreigner over yourselves who is not your 3countryman.

164Moreover, he shall not multiply horses for himself, nor shall he 5cause the people to return to Egypt to multiply horses, since 6the Lord has said to you, ‘You shall never again return that way.’