Deuteronomy 17:18 in the World English Bible
It shall be, when he sits on the throne of his kingdom, that he shall write himself a copy of this law in a book, out of that which is before the Levitical priests.
Context
17 Neither shall he multiply wives to himself, that his heart turn not away: neither shall he greatly multiply to himself silver and gold.
18 And it shall be, when he sitteth upon the throne of his kingdom, that he shall write him a copy of this law in a book out of that which is before the priests the Levites:
19 And it shall be with him, and he shall read therein all the days of his life: that he may learn to fear the LORD his God, to keep all the words of this law and these statutes, to do them: