Adam Clarke on Ezekiel 19:14

Fire is gone out - A vindictive and murderous disposition has taken hold: -

Of a rod of her branches - Ishmael, son of Nethaniah, who was of the blood-royal of Judah: -

Hath devoured her fruit - Hath assassinated Gedaliah, slain many people, and carried off others into the country of the Ammonites. But he was pursued by Jonathan, the son of Kareah, who slew many of his adherents, and delivered much of the people.

She hath no strong rod - None of the blood-royal of Judah left. And from that time not one of her own royal race ever sat upon the throne of Israel.

This is a lamentation - This is a most lamentable business.

And shall be for a lamentation - These predictions shall be so punctually fulfilled, and the catastrophe shall be so complete, that it shall ever remain as a lamentation; as this state of Jerusalem shall never be restored. Even to the present day this, to a Jew, is a subject of mourning.