All ye inhabitants of the world, and dwellers on the earth, see ye, when {f} he lifteth up an ensign on the mountains; and when he bloweth a trumpet, hear ye.

(f) When the Lord prepared to fight against the Ethiopians.

Wesley's Notes

18:3 When - When God shall gather together the nations, as it were by the lifting up of an ensign, or by the sound of a trumpet, to execute his judgments upon this people.

Jamieson-Fausset-Brown Bible Commentary

3. see ye . hear ye-rather, "ye shall see . shall hear." Call to the whole earth to be witnesses of what Jehovah ("He") is about to do. He will "lift up an ensign," calling the Assyrian motley hosts together (Isa 5:26) on "the mountains" round Jerusalem, to their own destruction. This (the eighteenth chapter) declares the coming overthrow of those armies whose presence is announced in Isa 17:12, 13. The same motive, which led Hezekiah to seek aid from Egypt, led him to accept gladly the Ethiopian Tirhakah's aid (Isa 36:6; 37:9). Ethiopia, Egypt, and Judea were probably leagued together against the common enemy, 713 B.C. See notes on the [714]twenty-second chapter, where a difference of tone (as referring to a different period) as to Ethiopia is observable. Horsley takes the "ensign" to be the cross, and the "trumpet" the Gospel trumpet, which shall be sounded more loudly in the last days.

Matthew Henry's Concise Commentary

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.