12 And this will be the disease which the Lord will send on all the peoples which have been warring against Jerusalem: their flesh will be wasted away while they are on their feet, their eyes will be wasted in their heads and their tongues in their mouths. 13 And it will be on that day that a great fear will be sent among them from the Lord; and everyone will take his neighbour's hand, and every man's hand will be lifted against his neighbour's. 14 And even Judah will be fighting against Jerusalem; and the wealth of all the nations round about will be massed together, a great store of gold and silver and clothing. 15 And the horses and the transport beasts, the camels and the asses and all the beasts in those tents will be attacked by the same disease.

16 And it will come about that everyone who is still living, of all those nations who came against Jerusalem, will go up from year to year to give worship to the King, the Lord of armies, and to keep the feast of tents. 17 And it will be that if any one of all the families of the earth does not go up to Jerusalem to give worship to the King, the Lord of armies, on them there will be no rain. 18 And if the family of Egypt does not go up or come there, they will be attacked by the disease which the Lord will send on the nations:

Matthew Henry's Commentary on Zechariah 14:12-18

Commentary on Zechariah 14:8-15

(Read Zechariah 14:8-15)

Some consider that the progress of the gospel, beginning from Jerusalem, is referred to by the living waters flowing from that city. Neither shall the gospel and means of grace, nor the graces of the Spirit wrought in the hearts of believers by those means, ever fail, by reason either of the heat of persecution, or storms of temptation, or the blasts of any other affliction. Tremendous judgments appear to be foretold, to be sent upon those who should oppose the settlement of the Jews in their own land. How far they are to be understood literally, events alone can determine. The furious rage and malice which stir up men against each other, are faint shadows of the enmity which reigns among those who have perished in their sins. Even the inferior creatures often suffer for the sin of man, and in his plagues. Thus God will show his displeasure against sin.

Commentary on Zechariah 14:16-21

(Read Zechariah 14:16-21)

As it is impossible for all nations literally to come to Jerusalem once a year, to keep a feast, it is evident that a figurative meaning must here be applied. Gospel worship is represented by the keeping of the feast of tabernacles. Every day of a Christian's life is a day of the feast of tabernacles; every Lord's day especially is the great day of the feast; therefore every day let us worship the Lord of hosts, and keep every Lord's day with peculiar solemnity. It is just for God to withhold the blessings of grace from those who do not attend the means of grace. It is a sin that is its own punishment; those who forsake the duty, forfeit the privilege of communion with God. A time of complete peace and purity of the church will arrive. Men will carry on their common affairs, and their sacred services, upon the same holy principles of faith, love and obedience. Real holiness shall be more diffused, because there shall be a more plentiful pouring forth of the Spirit of holiness than ever before. There shall be holiness even in common things. Every action and every enjoyment of the believer, should be so regulated according to the will of God, that it may be directed to his glory. Our whole lives should be as one constant sacrifice, or act of devotion; no selfish motive should prevail in any of our actions. But how far is the Christian church from this state of purity! Other times, however, are at hand, and the Lord will reform and enlarge his church, as he has promised. Yet in heaven alone will perfect holiness and happiness be found.