I will deliver Zedekiah— See the execution of these menaces in chap. 52: and 2 Kings 25. We may just observe, that Zedekiah himself was not slain, but carried to Babylon, where he died, though his sons and his great men were slain by the command of Nebuchadrezzar: but it is common with all writers to express that it indefinitely, which is true of the greatest part of the persons concerned.
Related Commentaries of Jeremiah 21:7
Jeremiah 21:7
7 And afterward, saith the LORD, I will deliver Zedekiah king of Judah, and his servants, and the people, and such as are left in this city from the pestilence, from the sword, and from the famine, into the hand of Nebuchadrezzar king of Babylon, and into the hand of their enemies, and into the hand of those that seek their life: and he shall smite them with the edge of the sword; he shall not spare them, neither have pity, nor have mercy.