John Gill Commentary Jeremiah 34:4

"Yet hear the word of Jehovah, O Zedekiah king of Judah: thus saith Jehovah concerning thee, Thou shalt not die by the sword;" — Jeremiah 34:4 (ASV)

Yet listen to the word of the Lord, O Zedekiah king of Judah Which, though a king, he ought to listen to; and, besides, what follows was for comfort, being a mitigation of his sentence, and containing in it mercy, as well as judgment: thus says the Lord of you, you shall not die by the sword: of the king of Babylon; or a violent death; and therefore fear not to deliver up yourself and city into his hands; which he might be unwilling to do, fearing he would put him to death immediately.