Deuteronomy 17:17-19 Easy-to-Read Version (ERV)
17 Also, the king must not have too many wives, because that will make him turn away from the Lord. And he must not make himself rich with silver and gold.
18 “When the king begins to rule, he must write a copy of the law for himself in a book. He must make that copy from the books that the priests from the tribe of Levi keep. 19 He must keep that book with him and read from it all his life, because he must learn to respect the Lord his God. He must learn to completely obey everything the law commands.