John Gill Commentary Ezekiel 38:22

"And with pestilence and with blood will I enter into judgment with him; and I will rain upon him, and upon his hordes, and upon the many peoples that are with him, an overflowing shower, and great hailstones, fire, and brimstone." — Ezekiel 38:22 (ASV)

And I will plead against him with pestilence and with blood , &c.] Not only the sword of the Jews and the sword of Christian princes shall be drawn against him, and the sword of Gog's soldiers against one another; but the Lord himself would plead with him by his judgments, or take vengeance on him, as the Targum; and send a pestilence in his army, which should destroy vast numbers of it; as the army of Sennacherib was destroyed by one when before Jerusalem; and make a great slaughter among them by that and other judgments.

and I will rain upon him, and upon his bands, and upon the many people that are with him, an overflowing rain ; a horrible tempest of divine wrath, (Psalms 11:6) as he came into the land of Israel like a storm, so he shall be destroyed by one much more terrible.

and great hailstones ; such as were cast upon the Canaanites, (Joshua 10:11) and as there will be on men, the enemies of the church of God, at the pouring out of the seventh vial, (Revelation 16:21).

fire and brimstone ; as God rained upon Sodom and Gomorrah, (Genesis 19:24) , signifying that in like manner will God deal with those enemies of his people; so at the battle of Armageddon, which seems to be the same with this here, the beast and the false prophet will be taken alive, and cast into a lake of fire burning with brimstone, (Revelation 19:20) , and to this rain or tempest of fire and brimstone upon Gog there is an allusion in (Revelation 20:9) .