Zechariah 14:3-9

Then the LORD will go forth and fight against those nations, as when He fights on a day of battle. In that day His feet will stand on the Mount of Olives, which is in front of Jerusalem on the east; and the Mount of Olives will be split in its middle from east to west by a very large valley, so that half of the mountain will move toward the north and the other half toward the south. You will flee by the valley of My mountains, for the valley of the mountains will reach to Azel; yes, you will flee just as you fled before the earthquake in the days of Uzziah king of Judah. Then the LORD, my God, will come, and all the holy ones with Him! In that day there will be no light; the luminaries will dwindle. For it will be a unique day which is known to the LORD, neither day nor night, but it will come about that at evening time there will be light. And in that day living waters will flow out of Jerusalem, half of them toward the eastern sea and the other half toward the western sea; it will be in summer as well as in winter. And the LORD will be king over all the earth; in that day the LORD will be the only one, and His name the only one.