Ezekiel 38:14-16

14Therefore, son of man, prophesy, and say unto Gog, Thus saith the Lord GOD: In that day when my people Israel dwelleth securely, shalt thou not know it?

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.