Romans 9:27-29

Verse 27

Esaias also crieth - The apostle pursues his argument, which had for its object the proof that God, for their infidelity, had rejected the great body of the Jews, and that but a few of them would embrace the Gospel, and be saved from that besom of destruction which was now coming to sweep them and their state away. Dr. Taylor paraphrases this and the following verses thus: And that but a small remnant of the Jews shall now be taken into the Church, is agreeable to former dispensations; for the Prophet Isaiah expressly declares concerning the Israelites, Isa 10:22, Isa 10:23 : Though the number of the children of Israel be as the sand of the sea, (for the promise to Abraham has been amply fulfilled), only a remnant shall be saved; the consumption decreed shall overflow in righteousness. For the Lord God of hosts shall make a consumption, even determined in the midst of all the land.
Verse 28

For he will finish the work, and cut it short, etc. - These appear to be forensic terms, and refer to the conclusion of a judicial proceeding; the Lord has tried and found them guilty, and will immediately execute upon them the punishment due to their transgressions.
Verse 29

And as Esaias said before - What God designs to do with the Jews at present, because of their obstinacy and rebellion, is similar to what he has done before, to which the same prophet refers, Isa 1:9 : Except the Lord of hosts had left unto us a very small remnant, we should have been as Sodom, and we should have been like unto Gomorrha: i.e. had not God, who commands and overrules all the powers in heaven and earth, in mercy preserved a very small remnant, to keep up the name and being of the nation, it had been quite cut off and extinct, as Sodom and Gomorrha were. Thus we learn that it is no new thing with God to abandon the greatest part of the Jewish nation, when corrupt, and to confine his favor and blessing to a righteous, believing few.

Instead of remnant, שריד sarid, both the Septuagint and the apostle have σπερμα, a seed, intimating that there were left just enough of the righteous to be a seed for a future harvest of true believers. So the godly were not destroyed from the land; some remained, and the harvest was in the days of the apostles.
Copyright information for Clarke