18 And it will be, when he sits on the throne of his kingdom, that he will write himself a copy of this law in a book, out of [that which is] before the priests the Levites:

19 and it will be with him, and he will read in it all the days of his life; that he may learn to fear Yahweh his God, to keep all the words of this law and these statutes, to do them;

20 that his heart is not lifted up above his brothers, and that he does not turn aside from the commandment, to the right hand, or to the left: to the end that he may prolong his days in his kingdom, he and his sons, in the midst of Israel.