And he shall pass through Judah; he shall overflow and go over, he shall reach even to the {i} neck; and the spread of his wings shall fill the breadth of thy land, O {k} Immanuel.

(i) It will be ready to drown them.

(k) He speaks this to Messiah, or Christ, in whom the faithful were comforted and who would not suffer his Church to be destroyed utterly.

Wesley's Notes

8:8 Reach - So that they shall be in great danger of being desired. He persists in the metaphor of a river swelling so high as to reach to a man's neck, and be ready to overwhelm him. Such was the danger of Judah's land, when Sennacherib took all the fenced cities of Judah, 2Kings 18:13, and sent his army against Jerusalem. Wings - Of his forces, or of the wings of his army, as they still are called. My land - Of the land of Judah, so called because the Messiah, who is called Immanuel, should be born there. And this is added emphatically for the consolation of God's people, to assure them, that notwithstanding this dreadful scourge, yet God would make a difference between Israel and Judah, and whereas Israel should not be a people, Judah should be restored, for the sake of the Messiah, to be the place of his birth and ministry.

King James Translators' Notes

stretching...: Heb. fulness of the breadth of thy land shall be the stretchings out of his wings

Jamieson-Fausset-Brown Bible Commentary

8. pass through-The flood shall not stop at Syria and Samaria, but shall penetrate into Judea.

the neck-When the waters reach to the neck, a man is near drowning; still the head is not said to be overflowed. Jerusalem, elevated on hills, is the head. The danger shall be so imminent as to reach near it at Sennacherib's invasion in Hezekiah's reign; but it shall be spared (Isa 30:28).

wings-the extreme bands of the Assyrian armies, fulfilled (Isa 36:1; 37:25).

thy land, O Immanuel-Though temporarily applied to Isaiah's son, in the full sense this is applicable only to Messiah, that Judea is His, was, and still is, a pledge that, however sorely overwhelmed, it shall be saved at last; the "head" is safe even now, waiting for the times of restoration (Ac 1:6); at the same time these words imply that, notwithstanding the temporary deliverance from Syria and Israel, implied in "Immanuel," the greatest calamities are to follow to Judah.

Matthew Henry's Concise Commentary

8:1-8 The prophet is to write on a large roll, or on a metal tablet, words which meant, Make speed to spoil, hasten to the prey: pointing out that the Assyrian army should come with speed, and make great spoil. Very soon the riches of Damascus and of Samaria, cities then secure and formidable, shall be taken away by the king of Assyria. The prophet pleads with the promised Messiah, who should appear in that land in the fulness of time, and, therefore, as God, would preserve it in the mean time. As a gentle brook is an apt emblem of a mild government, so an overflowing torrent represents a conqueror and tyrant. The invader's success was also described by a bird of prey, stretching its wings over the whole land. Those who reject Christ, will find that what they call liberty is the basest slavery. But no enemy shall pluck the believer out of Emmanuel's hand, or deprive him of his heavenly inheritance.