John Calvin on Jeremiah 39:6

It is probable that Nebuchadnezzar continued in that pleasant city while Jerusalem was attacked, for he would not endure the weariness of a long siege, and he also wished to be far away from danger. It was enough for him that his generals, of whom mention is made, fought under his banner. Nebuchadnezzar then was beyond the reach of danger, and yet he filled the Jews with terror, because he did not return home, or to the principal seat of government, but remained in the neighborhood; for the Antioch of Syria was not far from Judea.

The Prophet now tells us how cruelly Nebuchadnezzar acted towards Zedekiah. It was surely a sad spectacle to see a king, who had been before in repute, who was of a noble family, who was a type of Christ, lying prostrate at the feet of a proud conqueror. But much more bitter to him than this, was to see his own sons killed before his eyes. It would have been better for him to die a hundred times than to be compelled to witness that slaughter. He was, however, compelled to do so. And then, that all hope might be cut off, all those who excelled in dignity and power were slain. For under the name princes, Jeremiah generally in-eluded the chief men; so that all who had any name among the people were killed. It was a horrible carnage! not only the king’s sons were slain, but all who were capable of restoring the city and the land to a better condition. Thus Nebuchadnezzar wished to take away every hope, by putting to death the royal family and all the nobles. It afterwards follows —

Jeremiah 39:7

7. Moreover he put out Zedekiah’s eyes, and bound him with chains, to carry him to Babylon.

7. Et oculos Zedechiae excaecavit, et vinxit eum cathenis (in duali numero, duabus cathenis,) ut adduceret ipsum Babylonem.