‘The LORD has appointed you priest in place of Jehoiada, to be the chief officer in the house of the LORD, responsible for any madman who acts like a prophet—you must put him in stocks and neck irons.
Here follows the subject of the letter, Jehovah hath made thee a priest, etc. Here the impostor Shemaiah accuses the high-priest of ingratitude, because he had been chosen in the place of another. For it is probable that Jehoiada was still living, but that he had been led away into Chaldea with the other exiles.
We have perused the contents of Jeremiah's letter to the captives in Babylon, who had reason, with a great deal of thanks to God and him, to acknowledge the receipt of it, and lay it up among their treasures. But we cannot wonder if the false prophets they had among them were enraged at it; for it gave them their true character.
Commenting on Jeremiah 29:24-32
The Lord hath made thee priest in the stead of Jehoiada the priest,.... The same with Seraiah, who might have more names than one, and Jehoiada be one of them, who either was removed, or carried captive; and this Zephaniah, his sagan of deputy, succeeded him.