Isaiah 8:5 - Joseph Benson’s Commentary on the Old and New Testaments

The Lord spake also “After having given the promise concerning the deliverance of the people from the fear of the two adverse kingdoms, God, by a new, or a continued revelation, (for it was not very distant in time from the former,) more distinctly unfolds his purpose concerning the fate, not only of Israel, but of Judah, and confirms what he had advised in the former prophecy concerning them. See chap. 7:17, &c. For this is of nearly the same argument, except that it is more extensive, and involves many more mysteries. The first part is entirely prophetical, from this to Isaiah 8:11, and contains a declaration of the events of the subsequent period, immediately leading to the time of fulfilling the promise respecting Immanuel: of these events, the first is the subversion of Ephraim, Isaiah 8:6-7; the second, the affliction of Judah, by the Assyrians also, Isaiah 8:8; the third, the destruction of the hostile counsels and attempts of future times, which seemed to threaten a total excision of the church of God, Isaiah 8:9-10.” Vitringa and Dodd.