Matthew Poole and continuators on Deuteronomy 17:15

15 Thou shalt in any wise set him king over thee, whom the LORD thy God shall chuse . One from among thy brethren shalt thou set king over thee: thou mayest not set a stranger over thee , which is not thy brother.

(i. e.) Appoint, or instal. If you will chuse a King, which I shall suffer you to do, I command you to observe this in your choice.

Approve of, or appoint. So it was in Saul, and in David. God reserved to himself the nomination both of the Family, and of the person. See 1 Sam. 9. 15. & 10. 24. and 16. 12. 1 Chron. 28. 4, 5.

Of the same nation and Religion; partly because such a person was most likely to maintain true Religion, and to rule with righteousness, gentleness, and kindness to his subjects; and partly that he might be a fit type of Christ their supream King, who was to be one of their brethren.

To wit, by thy own choice and consent; but if God by his providence and for their sins should set a stranger over them, they might submit to him, as appears from Ier. 38. 17. Ezek. 17. 12. Mat. 22. 17.

Marginal references: Jer. 30. 21.