Ezekiel 38:15-16

15And thou shalt come from thy place out of the uttermost parts of the north, thou, and many peoples with thee, all of them riding upon horses, a great company and a mighty army; 16and thou shalt come up against my people Israel, as a cloud to cover the land: it shall come to pass in the latter days, that I will bring thee against my land, that the nations may know me, when I shall be sanctified in thee, O Gog, before their eyes.