John Gill Commentary Ezekiel 39:22

"So the house of Israel shall know that I am Jehovah their God, from that day and forward." — Ezekiel 39:22 (ASV)

So the house of Israel shall know that I am the Lord their
God
That has chosen them, redeemed them, called them, manifested his covenant love and grace to them, and protected and defended them: this destruction of their enemies will be a proof of it; and they will hereby be led into a clearer knowledge of him, and of his goodness to them; and make a more firm and constant profession of him, even from that day and forward ,
to the end of time; for after this the Jews will no more apostatize, but will for ever remain the people of God and Christ.