John Calvin's Bible Commentary
Jeremiah 17:24
Jeremiah introduced, as I have said, a condemnation as to the fathers, that he might make the Jews of his age ashamed of themselves, lest they shouhl imitate the example of those whom they saw to have been disobedient to God. He yet shews, that God would be reconciled to them, provided they from the heart repented; as though he had said, — “Your fathers indeed provoked, for many years, and even for ages, the vengeance of God; but as he is ever inclined to mercy, he is ready to forgive you, if only you cease to follow your fathers and return to him.” In short, he promises them pardon for the time past, if they turned to God.
If by hearing ye will hear, he says, so as to carry no burden through the gates of this city on the sabbath-day, and to sanctify (this is connected with “hear”) the sabbath-day, so that ye do no work on it; then shall enter through the gates of this city kings and princes, etc. He first promises them a perpetuity as to the kingdom; and it was the chief happiness of the people to have a king from the posterity of David; for thus they saw as it were with their eyes the favor of God present, with them, inasmuch as David and his posterity were visible pledges of God’s favor. And we must remember also, that that kingdom was a type of a better kingdom, which had not yet been plainly discovered. Hence in the posterity of David the Jews beheld Christ, until he was manifested. For this reason I said, that they were miserable without a king, and that the perpetuity of the kingdom was a main part, of their happiness. This is the reason why Jeremiah now sets before them, as a singular benefit, the continuance of David’s kingdom among them, provided they observed the sabbath-day: and thus God did not only strictly demand what he had a ritht to do, but also allured them by the sweetness of his promise, according to his usual manner. He may indeed in one word command what he pleases; but when he invites us by promises, he has a regard to our infirmity.