John Gill Commentary Ezekiel 38:3

"and say, Thus saith the Lord Jehovah: Behold, I am against thee, O Gog, prince of Rosh, Meshech, and Tubal:" — Ezekiel 38:3 (ASV)

And say, thus saith the Lord God, behold, I am against thee, O
Gog, the chief prince of Meshech and Tubal.
Which is repeated for the confirmation of it, that so it would certainly be; that the Lord, the mighty God, and King of kings, would in his providence frown upon him, and appear against him; and his titles are repeated also, to show that all his greatness, grandeur, and power, would not protect him from the vengeance of God.