Therefore prophesy, son of man, and tell Gog that this is what the Lord GOD says: On that day when My people Israel are dwelling securely, will you not take notice of this?
The dream is doubled because the thing is certain and demands careful regard. God lets men know of Israel's security, their easy prey, their careless rest, yet He knows they will misuse that knowledge for their own ruin; their safety is real, grounded in His protection, and no weapon formed against them shall prosper.
AI summary
Commenting on Ezekiel 38:14-23
And thou shalt come from thy place out of the north parts,.... Whose original was from Scythia, or Cathaia in Tartary, that lies to the north of China; and who will bring with him many people from the Euxine and Caspian seas, and from the northern parts of lesser Asia; and the Turk is, by many interpreters, thought to be the king of the north...
shalt thou not know it?--to thy cost, being visited with punishment, while Israel dwells safely.