Zechariah 14:4

4 On that day his feet shall stand on the Mount of Olives, which lies before Jerusalem on the east; and the Mount of Olives shall be split in two from east to west by a very wide valley; so that one half of the Mount shall withdraw northward, and the other half southward.

Zechariah 14:4 In-Context

2 For I will gather all the nations against Jerusalem to battle, and the city shall be taken and the houses looted and the women raped; half the city shall go into exile, but the rest of the people shall not be cut off from the city.
3 Then the Lord will go forth and fight against those nations as when he fights on a day of battle.
4 On that day his feet shall stand on the Mount of Olives, which lies before Jerusalem on the east; and the Mount of Olives shall be split in two from east to west by a very wide valley; so that one half of the Mount shall withdraw northward, and the other half southward.
5 And you shall flee by the valley of the Lord's mountain, for the valley between the mountains shall reach to Azal; and you shall flee as you fled from the earthquake in the days of King Uzziah of Judah. Then the Lord my God will come, and all the holy ones with him.
6 On that day there shall not be either cold or frost.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.