John Calvin on Jeremiah 39:4

he then adds, After Zedekiah saw them, etc.; not that he came to that part, but after he understood that that part of the city was occupied by the enemies; for matters then had come to an extremity. Then he fled with his men of war. And here is set before us a sad spectacle: men in no way trained up for war were left in the city, women also and children were left there, while the men of war fled, inasmuch as their condition was worse, because they had delayed the taking of the city. It was then according to what is commonly done, that they fled. We yet see that ungodly men, after having long despised heavenly truth, flee in time of danger, and are so filled with terror, that they cast themselves headlong into many perils. This is a just reward to those who are not terrified by the threatenings of God, but become so hardened, that they too late acknowledge that they ought to have feared; and being, as it were, stunned, they see not what is expedient, and cannot follow any fixed course.

The Prophet adds, that they fled in the night, and that they went out by the way of the king’s garden, and lastly, that they came to the gate which was between the two walls There is in this passage nothing superfluous; for he meant to shew us, that though the king thought that he could escape from the hands of his enemies, he was yet taken, as God had predicted. For, if after the city was taken, he had come as a suppliant, of his own accord, he might probably have obtained mercy; and this counsel, we know, was given while the state of things was not yet desperate; but he put no faith in God’s word. In the meantime he thought that he could disappoint his enemies, if he quickly fled through some secret way. Some think that there was a subterranean passage, which had a door in the middle of the garden, and had also an egress at the other end in the plain of Jericho, as we shall hereafter see. And that region was barren, and therefore solitary. Hence the king entertained confidence; but he found, at length, how certain was prophetic truth; for it is said afterwards, that the Chaldeans followed and took him. But this circumstance, as I have said, ought to be carefully observed, that the king, as the Prophet tells us, fled. through a secret way, during the darkness of the night, and escaped. It now follows —

Jeremiah 39:5

5. But the Chaldeans’ army pursued after them, and overtook Zedekiah in the plains of Jericho: and when they had taken him, they brought him up to Nebuchadnezzar king of Babylon to Riblah in the land of Hamath, where he gave judgment upon him.

5. Et persecuti sunt exercitus Chaldaeorum ipsos, et apprehenderunt Zedechiam in desertis Jericho (alii vertunt, in planicie, et fuit planicies; coeterum ut dixi, inculta, et squalida et vacua etiam incolis;) et tulerunt ipsum, et adduxerunt ad Nebuchadnezer regem Babylonis Riblathah (urbem) in terra Chemath, qui locutus est cum ipso judicia.