Deuteronomy 17:17-19 New Living Translation (NLT)
17 The king must not take many wives for himself, because they will turn his heart away from the Lord. And he must not accumulate large amounts of wealth in silver and gold for himself.
18 “When he sits on the throne as king, he must copy for himself this body of instruction on a scroll in the presence of the Levitical priests. 19 He must always keep that copy with him and read it daily as long as he lives. That way he will learn to fear the Lord his God by obeying all the terms of these instructions and decrees.
Deuteronomy 17:17-19 New International Version (NIV)
17 He must not take many wives, or his heart will be led astray. He must not accumulate large amounts of silver and gold.
18 When he takes the throne of his kingdom, he is to write for himself on a scroll a copy of this law, taken from that of the Levitical priests. 19 It is to be with him, and he is to read it all the days of his life so that he may learn to revere the Lord his God and follow carefully all the words of this law and these decrees