Deuteronomio 17:20

20 Para que no se eleve su corazón sobre sus hermanos, ni se aparte del mandamiento á diestra ni á siniestra: á fin que prolongue sus días en su reino, él y sus hijos, en medio de Israel.

Deuteronomio 17:20 Meaning and Commentary

Deuteronomy 17:20

That his heart be not lifted up above his brethren
On account of his office, the dignity of it, considering that he was subject to the law of God, and accountable to the Lord for all his actions:

and that he turn not aside from the commandment, to the right hand or
to the left;
not in the least deviate from the law of God in the whole of his conduct, and particularly in the exercise of his kingly office:

to the end that he may prolong his days in his kingdom;
ruling well according to the laws of God being the way to rule long:

he and his children in the midst of Israel;
this shows, as Jarchi observes, that if his son was fit for the kingdom, he was to be preferred to any other man; for though it was elective, yet to be continued in the same family, provided they walked in the ways of the Lord, and observed his laws.

Deuteronomio 17:20 In-Context

18 Y será, cuando se asentare sobre el solio de su reino, que ha de escribir para sí en un libro un traslado de esta ley, del original de delante de los sacerdotes Levitas;

19 Y lo tendrá consigo, y leerá en él todos los días de su vida, para que aprenda á temer á Jehová su Dios, para guardar todas las palabras de aquesta ley y estos estatutos, para ponerlos por obra:

20 Para que no se eleve su corazón sobre sus hermanos, ni se aparte del mandamiento á diestra ni á siniestra: á fin que prolongue sus días en su reino, él y sus hijos, en medio de Israel.