Zechariah 14
4 Ref And his feet shall stand in that day upon the mount of Olives, which is before Jerusalem on the east; and the mount of Olives shall be cleft in the midst thereof toward the east and toward the west, `and there shall be' a very great valley; and half of the mountain shall remove toward the north, and half of it toward the south.
5 Ref And ye shall flee by the valley of my mountains; for the valley of the mountains shall reach unto Azel; yea, ye shall flee, like as ye fled from before the earthquake in the days of Uzziah king of Judah; and Jehovah my God shall come, and all the holy ones with thee.