Ezekiel 38:16, 23

You will come up against my people Israel, like a cloud covering the land. In the latter days I will bring you against my land, that the nations may know me, when through you, O Gog, I vindicate my holiness before their eyes.

So I will show my greatness and my holiness and make myself known in the eyes of many nations. Then they will know that I am the LORD.