Charles Ellicott Commentary Isaiah 48:3

"I have declared the former things from of old; yea, they went forth out of my mouth, and I showed them: suddenly I did them, and they came to pass." — Isaiah 48:3 (ASV)

I have declared ... —Once more, for the seventh time, the prophet presses the fact of Divine foreknowledge, not, as before, against the “no-faith” of the Gentiles, but against the “little faith” of Judah.