Deuteronomy 17:18-19

YLT(i) 18 `And it hath been, when he sitteth on the throne of his kingdom, that he hath written for himself the copy of this law, on a book, from that before the priests the Levites, 19 and it hath been with him, and he hath read in it all days of his life, so that he doth learn to fear Jehovah his God, to keep all the words of this law, and these statutes, to do them;