John Calvin Reformed @genevareformer

15. For thus saith the Lord. Here he describes one kind of contempt of God; for when warnings are addressed to hypocrites in general terms, they commonly produce little effect. In addition to the general doctrine, therefore, the prophets specify particular instances, which they specially accommodate to the conduct of those with whom they have to do, so as always to aim at a definite object.

Matthew Henry Presbyterian @wholebiblehenry

Here, I. The preface is very awful. The prophet must not only preach this, but he must write it (Isa 30:8), write it in a table, to be hung up and exposed to public view; he must carefully note it, not in loose papers which might be lost or torn, but in a book, to be preserved for posterity, in perpetuam rei memoriam - for...

Commenting on Isaiah 30:8-17

John Gill Reformed Baptist @doctorgill

For thus saith the Lord GOD, the Holy One of Israel,.... This is still repeated, though displeasing to the carnal Jews, who, notwithstanding their ill behaviour to the Lord, condescends to give them the best advice, as follows: in returning and rest shall ye be saved; or "may be saved" (o); this is the right and the only way, namely, by "returning" from their evil...