John Calvin Commentary Jeremiah 28:3

"Within two full years will I bring again into this place all the vessels of Jehovah`s house, that Nebuchadnezzar king of Babylon took away from this place, and carried to Babylon:" — Jeremiah 28:3 (ASV)

We now see that Hananiah’s intention was to promise impunity to the people. Not only this, but he also aimed to soothe them with false confidence, as if the people would soon have their king restored, along with the spoils that the enemy had taken away. However, he began by referring to the king’s power, lest that terrible sight should so occupy the people’s minds as to prevent them from receiving this joyful prophecy.

He then says, Further, when two years pass, I will bring back to this place all the vessels which King Nebuchadnezzar has taken away. Jeremiah had assigned seventy years for the people’s exile, as has been stated before and as we will often see later. But here the false prophet says that after two years, the exile of the king and of the people would end, and the vessels that had been taken away would be restored; he also speaks of the king himself.