Deuteronomy 17:18

18“And when he sits on the throne of his kingdom, ahe shall write for himself in a book a copy of this law, bapproved by
Hebrew from before
the Levitical priests.

Deuteronomy 17:20

20that his heart may not be lifted up above his brothers, and that he dmay not turn aside from the commandment, either to the right hand or to the left, eso that he may continue long in his kingdom, he and his children, in Israel.

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