The Jews thought that since Nebuchadnezzar had not taken all the vessels of the temple, that they were free from anymore attacks, but the Lord assured them that the king of Babylon would finish what he had started,

For thus says the LORD of hosts concerning the pillars, concerning the Sea, concerning the carts, and concerning the remainder of the vessels that remain in this city, which Nebuchadnezzar king of Babylon did not take, when he carried away captive Jeconiah the son of Jehoiakim, king of Judah, from Jerusalem to Babylon, and all the nobles of Judah and Jerusalem—yes, thus says the LORD of hosts, the God of Israel, concerning the vessels that remain in the house of the LORD, and in the house of the king of Judah and of Jerusalem: “They shall be carried to Babylon, and there they shall be until the day that I visit them,” says the LORD. “Then I will bring them up and restore them to this place” (Jeremiah 27.19–22).

The Lord was giving them ample opportunity to repent, which He showed to them when Babylon did not completely destroy the temple. However, if the Jews persisted in their sin, the Lord would send Babylon again and finish the job, which is what happened.

Let us not think that a reprieve means the Lord will not punish, but He is giving a chance to repent.