Isaiah 66:7 - Matthew Poole's English Annotations on the Holy Bible

The whole verse is expressive of a great and sudden salvation, which God would work for his church, like the delivery of a woman, and that of a man child, before her travail, and without pain. The only doubt is, whether it referreth to the deliverance of the people out of Babylon, or the world's surprisal with the Messiah, and the sudden and strange propagation of the gospel, and it is a question not easily determined. The delivery of the Jews out of Babylon, indeed, was without strugglings or any pain; not like their deliverance from Egypt, after the wasting of their enemies by ten successive plagues, but by the kind proclamation of Cyrus. But it seems not to have been sudden, only as to the day, and hour, and manner; for Daniel understood by books that the time was come, Daniel 9:2, and the people had a prospect of it seventy years before, Jeremiah 25:12, Jeremiah 29:10. The prophecy therefore seems rather to refer to the coming of Christ, and the sudden propagation of the gospel. The popish interpreters applying it to the Virgin Mary bringing forth Christ, is like other of their fond dreams.