Deuteronomy 17:20

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

and not consider himself better than his fellow Israelites and turn from the law to the right or to the left. Then he and his descendants will reign a long time over his kingdom in Israel.

That his heart be not lifted up above his brethren, and that he turn not 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 children, in the midst of Israel. Deuteronomy 16 Books Deuteronomy 18