Zechariah 14:3-4

3Then the Lord will go forth and 1fight against those nations, as 2when He fights on a day of battle.

4On that day His feet will 3stand on the Mount of Olives, which is in front of Jerusalem on the east; and the Mount of Olives will be 4split 5in its middle from east to west forming a very large valley. Half of the mountain will move toward the north, and the other half toward the south.