Deuteronomy 17:16-18

Complete Jewish Bible

¹⁶ However, he is not to acquire many horses for himself or have the people return to Egypt to obtain more horses, inasmuch as Adonai told you never to go back that way again. ¹⁷ Likewise, he is not to acquire many wives for himself, so that his heart will not turn away; and he is not to acquire excessive quantities of silver and gold.

¹⁸ “When he has come to occupy the throne of his kingdom, he is to write a copy of this Torah for himself in a scroll, from the one the cohanim and L’vi’im use.