Deuteronomy 17:18-20

Young's Literal Translation

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;

²⁰ so that his heart is not high above his brethren, and so as not to turn aside from the command, right or left, so that he prolongeth days over his kingdom, he and his sons, in the midst of Israel.