The force of the words is, "When the slain shall fall in the midst of you, then at last ye shall know that I am the Lord." So in Ezekiel 6:10 where the knowledge implies a recognition of the merciful intent of Yahweh's dispensations, and therefore, a hope of restoration.

And the slain shall fall in the midst of you,.... The word for slain is in the singular number, which perhaps is put for the plural; and so the Septuagint renders it; unless it should design some principal person that should be slain; but, as King Zedekiah was not slain when the city was taken, only his sons and his princes, it seems best to understand it of the multitude that were slain in the midst of the land, not only in Jerusalem, but in all the cities of Judea; and denotes how general and public the destruction would be:

and ye shall know that I am the Lord; the only true God, and Governor of the world; who only is to be worshipped, feared, and served, and not idols.

And the slain shall fall in the midst of you, and ye shall know that I am the LORD.

7. ye shall know that I am the Lord-and not your idols, lords. Ye shall know Me as the all-powerful Punisher of sin.

6:1-7. War desolates persons, places, and things esteemed most sacred. God ruins idolatries even by the hands of idolaters. It is just with God to make that a desolation, which we make an idol. The superstitions to which many trust for safety, often cause their ruin. And the day is at hand, when idols and idolatry will be as thoroughly destroyed from the professedly Christian church as they were from among the Jews.