Deuteronomy 17:12-16

But the person who acts insolently by not listening to the priest who stands there to serve the Lord your God, nor to the judge, that person shall die; so you shall eliminate the evil from Israel.

Then all the people will hear and be afraid, and will not act insolently again.

“When you enter the land which the Lord your God is giving you, and you take possession of it and live in it, and you say, ‘I will appoint a king over me like all the nations who are around me,’

you shall in fact appoint a king over you whom the Lord your God chooses. One from among your countrymen you shall appoint as king over yourselves; you may not put a foreigner over yourselves, anyone who is not your countryman.

In any case, he is not to acquire many horses for himself, nor shall he make the people return to Egypt in order to acquire many horses, since the Lord has said to you, ‘You shall never again return that way.’