Deuteronomy 17:20 in the World English Bible
that his heart not be lifted up above his brothers, and that he not turn away 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 middle of Israel.
Context
19 And it shall be with him, and he shall read therein all the days of his life: that he may learn to fear the LORD his God, to keep all the words of this law and these statutes, to do them:
20 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.