John Gill Commentary Ezekiel 12:15

"And they shall know that I am Jehovah, when I shall disperse them among the nations, and scatter them through the countries." — Ezekiel 12:15 (ASV)

And they shall know that I [am] the Lord
God omniscient, and can and do foresee and foretell future events, when the above things shall come to pass; and omnipotent, able to do what he purposed and declared he would; and true and faithful to his word, and holy and righteous in all his ways and works: when I shall scatter them among the nations, and disperse them in the
countries ;
of Egypt, Babylon, Media, and other places.