New Living Translation
This regular reading will prevent him from becoming proud and acting as if he is above his fellow citizens. It will also prevent him from turning away from these commands in the smallest way. And it will ensure that he and his descendants will reign for many generations in Israel.

American Standard Version
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.

Berean Study Bible
Then his heart will not be exalted above his countrymen, and he will not turn aside from the commandment, to the right or to the left, in order that he and his sons may reign many years over his kingdom in Israel.

Douay-Rheims Bible
And that his heart be not lifted up with pride over his brethren, nor decline to the right or to the left, that he and his sons may reign a long time over Israel.

English Revised Version
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.

King James Bible
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.

World English Bible
that his heart not be lifted up above his brothers, and that he 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 children, in the midst of Israel.

Young's Literal Translation
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.

Deuteronomy 17:20 Additional Translations ...