Deuteronomy 17:20

“That his heart be not lifted up above his brethren, etc.] 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;…”

“that he may prolong his days in his kingdom, he and his children--From this it appears that the crown in Israel was to be hereditary, unless forfeited by personal crime. Next: Deuteronomy Chapter 18”

“If his heart be not lifted up - He intimates, that the scriptures diligently read, are a powerful means to keep him humble, because they shew him in that, tho' a king, he is subject to an higher monarch, to whom he must give an account of all his administrations, and receive from him his sentence agreeable to their quality, which is sufficient to abate the pride of the haughtiest person in the world. Next: Deuteronomy Chapter 18”

“his heart: Deu 8:2, Deu 8:13, Deu 8:14; Kg2 14:10; Ch2 25:19, Ch2 26:16, Ch2 32:25, Ch2 32:26, Ch2 33:12, Ch2 33:19, Ch2 33:23, Ch2 34:27; Psa 131:1, Psa 131:2; Isa 2:12; Dan 5:20-23; Hab 2:4; Co2 12:7; Pe1 5:5 he turn: Deu 4:2, Deu 5:32, Deu 12:25, Deu 12:28, Deu 12:32; Kg1 15:5 right hand: Deu 17:11; Sa1 13:13, Sa1 13:14, Sa1 15:23; Kg1 11:12, Kg1 11:13, Kg1 11:34, Kg1 11:36; Kg2 10:30; Psa 19:11; Psa 132:12; Pro 27:24; Ecc 8:13 that he: Pro 10:27 Next: Deuteronomy Chapter 18”