And it shall come to pass, that every one that is left of all the nations which came against Jerusalem shall even go up from year to year to worship the King, the LORD of hosts, and to keep the feast of tabernacles.

Wesley's Notes

14:16 That is left - That escapes the stroke. To worship - By a ceremonial usage which shadowed out a better worship, the prophet foretells the constant zeal of the converted Gentiles to worship the Lord. The feast of tabernacles - One solemn festival is by a figure, put for all the days consecrated to God for holy worship.

Jamieson-Fausset-Brown Bible Commentary

16. every one . left-(Isa 66:19, 23). God will conquer all the foes of the Church. Some He will destroy; others He will bring into willing subjection.

from year to year-literally, "from the sufficiency of a year in a year."

feast of tabernacles-The other two great yearly feasts, passover and pentecost, are not specified, because, their antitypes having come, the types are done away with. But the feast of tabernacles will be commemorative of the Jews' sojourn, not merely forty years in the wilderness, but for almost two thousand years of their dispersion. So it was kept on their return from the Babylonian dispersion (Ne 8:14-17). It was the feast on which Jesus made His triumphal entry into Jerusalem (Mt 21:8); a pledge of His return to His capital to reign (compare Le 23:34, 39, 40, 42; Re 7:9; 21:3). A feast of peculiar joy (Ps 118:15; Ho 12:9). The feast on which Jesus gave the invitation to the living waters of salvation ("Hosanna," save us now, was the cry, Mt 21:9; compare Ps 118:25, 26) (Joh 7:2, 37). To the Gentiles, too, it will be significant of perfected salvation after past wanderings in a moral wilderness, as it originally commemorated the ingathering of the harvest. The seedtime of tears shall then have issued in the harvest of joy [Moore]. "All the nations" could not possibly in person go up to the feast, but they may do so by representatives.

Matthew Henry's Concise Commentary

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.