Zechariah 14:4-5

14:4 On that day his feet will stand on the Mount of Olives which lies to the east of Jerusalem, and the Mount of Olives will be split in half from east to west, leaving a great valley. Half the mountain will move northward and the other half southward. 14:5 Then you will escape through my mountain valley, for the mountains will extend to Azal. Indeed, you will flee as you fled from the earthquake in the days of King Uzziah of Judah. Then the Lord my God will come with all his holy ones with him.