(3) When he lifteth up an ensign . . .--Both clauses are better taken as indefinite, when an ensign is set up . . . when a trumpet is sounded. The prophet calls on all nations (Ethiopia being specially included) to watch for the signal that shall be given, distinct as the beacon-fire on the hill, or the alarm of the trumpet, to proclaim the downfall of Assyria.

Verse 3. - All ye inhabitants of the world. From exhorting the messengers to hasten on their errand, Isaiah turns to the nations generally, and bids them attend to a coming signal - an ensign is about to be raised, a trumpet is about to be sounded - let them gaze and hearken; the result will be well worth noting. The imagery is not to be taken literally, but in the same way as the notices in Isaiah 11:10, 12; Isaiah 13:2. When he lifteth up an ensign... when he bloweth a trumpet; rather, when an ensign is lifted up... when a trumpet sounds. On the mountains. Wherever the great event took place, the signal for it was given on the mountains of Judea (see 2 Kings 19:20-34).

18:1-7 God's care for his people; and the increase of the church. - This chapter is one of the most obscure in Scripture, though more of it probably was understood by those for whose use it was first intended, than by us now. Swift messengers are sent by water to a nation marked by Providence, and measured out, trodden under foot. God's people are trampled on; but whoever thinks to swallow them up, finds they are cast down, yet not deserted, not destroyed. All the dwellers on earth must watch the motions of the Divine Providence, and wait upon the directions of the Divine will. God gives assurance to his prophet, and by him to be given to his people. Zion is his rest for ever, and he will look after it. He will suit to their case the comforts and refreshments he provides for them; they will be acceptable, because seasonable. He will reckon with his and their enemies; and as God's people are protected at all seasons of the year, so their enemies are exposed at all seasons. A tribute of praise should be brought to God from all this. What is offered to God, must be offered in the way he has appointed; and we may expect him to meet us where he records his name. Thus shall the nations of the earth be convinced that Jehovah is the God, and Israel is his people, and shall unite in presenting spiritual sacrifices to his glory. Happy are those who take warning by his judgment on others, and hasten to join him and his people. Whatever land or people may be intended, we are here taught not to think that God takes no care of his church, and has no respect to the affairs of men, because he permits the wicked to triumph for a season. He has wise reasons for so doing, which we cannot now understand, but which will appear at the great day of his coming, when he will bring every work into judgment, and reward every man according to his works.All ye inhabitants of the world, and dwellers on the earth,.... All the men of the world are here called upon, either by the Lord, or rather by the prophet, to be eye and ear witnesses of the judgment that should be inflicted upon the above nation, and of the salvation of his own people; which should be so manifest, that all should see it as easily as an ensign set up on a mountain; and the news of it should ring through the earth, and be as plainly heard as when a trumpet is blown: unless it should be thought that these are the words of the messengers sent to the above nation, addressing them in such terms, assuring them, that, however stupid and secure they were now, they should quickly see the sign and hear the alarm of war; it being usual to call any large kingdom the world, and the earth:

see ye, when be lifteth up an ensign on the mountains; or ye shall see this as clearly as when a flag is set up on a mountain; or ye shall be sensible of this judgment coming on, when a standard shall be set up on the mountains, to gather the people to war. Vitringa interprets this of the mountains of Judea, where the Assyrians would set up their banners, and blow their trumpets, as follows:

and when he bloweth a trumpet, hear ye; or, "ye shall hear"; the trumpet sounding as an alarm of war, by which the people will be summoned, and come to execute the judgment threatened. The Targum is,

"ye shall hear the redemption;''

that is, of Israel, in the times of the Messiah, and in the war of Gog and Magog; of which times Jarchi and Kimchi interpret this whole prophecy.