Jeremiah 8:4

Though God had reminded his Prophet of the event, yet he still invites the Jews to repentance; not that there was any hope of restoring them to a right mind, (for he had said that they were wholly irreclaimable,) but that their perverseness might be less excusable; and it was also his object to afford some relief to the small number of the godly who still remained; for they had not all fallen away into impiety, though the great body of the people had become corrupt. God then, partly to aggravate the sin of the ungodly, and partly to provide for his faithful people, exhorts those to repentance, who were yet wholly intractable. And here we ought to consider that God’s goodness, when abused, brings a much heavier judgment. God does here in a manner contend with the wickedness of his people, by setting before them the hope of pardon, if they repented.

Thou shalt then say to them; that is, “Though I have already testified to thee that thy labor would be in vain, yet thou shalt not give over thy work.” Shall they who have fallen rise again? This sentence is variously explained; the greater part of interpreters confine it to the Jews only, “Shall the Jews who have fallen rise again?” As to the second clause, some give this explanation, “If Israel returns, will not God also return?” that is, from his wrath, or, “Will he not be propitious?” Or, “If Israel turns away, will not God also turn away?” Others understand both parts of the sentence of the people, “If the people have once turned away, will they not yet return to God?” For the verb שוב, shub, has contrary meanings; it means, to fall away, to rebel, to go back; and it means also to return. But after having maturely considered the words and the design of the Prophet, I think it to be a general statement, as though he had said, “When any one falls, he immediately thinks of recovering his fall; when any one deviates from the right course, being warned of his going astray, he immediately looks for the road. This is what is usually done, what then means this so great a stupidity, that the people of Jerusalem do not repent, when yet they ought to have long ago acknowledged their fall and their wanderings?”