John Calvin on Jeremiah 46:1

Jeremiah begins here to prophesy against foreign nations, and continues to do so to the last chapter but one, not that he then for the first time began to announce these oracles, but as I have already said, a volume was at length formed, including his prophecies, the order of time being not everywhere observed; for we see in the 25th chapter that he threatened heathen nations with the punishments they had deserved before Jehoiakim was made king. But as I have said, the prophecies respecting heathen nations have been separated, though as to time Jeremiah had predicted what afterwards happened.