Here the Lord soundeth an alarm to, all the enemies of his Church; and they are admonished to attend to the sound of the trumpet, that then the Lord goeth forth for the salvation of his people, even for salvation with his Anointed. Every eye shall see, and all faces shall gather blackness, when the Lord turneth back the captivity of his people. And observe how striking is the prophet's expression: for so the Lord said unto me. Christ is the rest, in which Jehovah resteth, and is well pleased: and therefore in him, and his great salvation, Israel's deliverance and security is found. And hence, when the Lord swore in his wrath, that the unbelievers should not enter into his rest, it referred to their rejection of Christ; Hebrews 4:1, to the end.
Related Commentaries of Isaiah 18:3
Isaiah 18:3-6
3 All ye inhabitants of the world, and dwellers on the earth, see ye, when he lifteth up an ensign on the mountains; and when he bloweth a trumpet, hear ye.
4 For so the LORD said unto me, I will take my rest, and I will considerb in my dwelling place like a clear heat upon herbs, and like a cloud of dew in the heat of harvest.
5 For afore the harvest, when the bud is perfect, and the sour grape is ripening in the flower, he shall both cut off the sprigs with pruning hooks, and take away and cut down the branches.
6 They shall be left together unto the fowls of the mountains, and to the beasts of the earth: and the fowls shall summer upon them, and all the beasts of the earth shall winter upon them.