zechariah 14:5 And ye shall flee to the valley of the mountains; for the valley of the mountains shall reach unto Azal: yea, ye shall flee, like as ye fled from before the earthquake in the days of Uzziah king of Judah: and the LORD my God shall come, and all the saints with thee. - Free Bible Online

      5. ye shall flee to the valley--rather "through the valley," as in 2Sa 2:29. The valley made by the cleaving asunder of the Mount of Olives (Zec 14:4) is designed to be their way of escape, not their place of refuge [MAURER]. JEROME is on the side of English Version. If it be translated so, it will mean, Ye shall flee "to" the valley, not to hide there, but as the passage through which an escape may be effected. The same divinely sent earthquake which swallows up the foe, opens out a way of escape to God's people. The earthquake in Uzziah's days is mentioned (Am 1:1) as a recognized epoch in Jewish history. Compare also Isa 6:1: perhaps the same year that Jehovah held His heavenly court and gave commission to Isaiah for the Jews, an earthquake in the physical world, as often happens (Mt 24:7), marked momentous movements in the unseen spiritual world.
      of the mountains--rather, "of My mountains," namely, Zion and Moriah, peculiarly sacred to Jehovah [MOORE]. Or, the mountains formed by My cleaving Olivet into two [MAURER].
      Azal--the name of a place near a gate east of the city. The Hebrew means "adjoining" [HENDERSON]. Others give the meaning, "departed," "ceased." The valley reaches up to the city gates, so as to enable the fleeing citizens to betake themselves immediately to it on leaving the city.
      Lord my God . . . with thee--The mention of the "Lord my God" leads the prophet to pass suddenly to a direct address to Jehovah. It is as if "lifting up his head" (Lu 21:28), he suddenly sees in vision the Lord coming, and joyfully exclaims, "All the saints with Thee!" So Isa 25:9.
      saints--holy angels escorting the returning King (Mt 24:30, 31; Jude 14); and redeemed men (1Co 15:23; 1Th 3:13; 4:14). Compare the similar mention of the "saints" and "angels" at His coming on Sinai (De 32:2, 3; Ac 7:53; Ga 3:19; Heb 2:2). PHILLIPS thinks Azal is Ascalon on the Mediterranean. An earthquake beneath Messiah's tread will divide Syria, making from Jerusalem to Azal a valley which will admit the ocean waters from the west to the Dead Sea. The waters will rush down the valley of Arabah, the old bed of the Jordan, clear away the sand-drift of four thousand years, and cause the commerce of Petra and Tyre to center in the holy city. The Dead Sea rising above its shores will overflow by the valley of Edom, completing the straits of Azal into the Red Sea. Thus will be formed the great pool of Jerusalem (compare Zec 14:8; Eze 47:1, &c.; Joe 3:18). Euphrates will be the north boundary, and the Red Sea the south. Twenty-five miles north and twenty-five miles south of Jerusalem will form one side of the fifty miles square of the Lord's Holy Oblation (Eze 48:1-35). There are seven spaces of fifty miles each from Jerusalem northward to the Euphrates, and five spaces of fifty miles each southward to the Red Sea. Thus there are thirteen equal distances on the breadth of the future promised land, one for the oblation and twelve for the tribes, according to Eze 48:1-35. That the Euphrates north, Mediterranean west, the Nile and Red Sea south, are to be the future boundaries of the holy land, which will include Syria and Arabia, is favored by Ge 15:8; Ex 23:31; De 11:24; Jos 1:4; 1Ki 4:21; 2Ch 9:26; Isa 27:12; all which was partially realized in Solomon's reign, shall be antitypically so hereafter. The theory, if true, will clear away many difficulties in the way of the literal interpretation of this chapter and Eze 48:1-35.

JFB.