'Mountain' in the Bible

Who are you, great mountain? Before Zerubbabel you are a plain; and he will bring out the capstone with shouts of 'Grace, grace, to it!'"

Thus says Yahweh: "I have returned to Zion, and will dwell in the midst of Jerusalem. Jerusalem shall be called 'The City of Truth;' and the mountain of Yahweh of Armies, 'The Holy Mountain.'"

His feet will stand in that day on the Mount of Olives, which is before Jerusalem on the east; and the Mount of Olives will be split in two, from east to west, making a very great valley. Half of the mountain will move toward the north, and half of it toward the south.