It is just as Isaiah foretold: “Unless the Lord of Hosts had left us descendants, we would have become like Sodom, we would have resembled Gomorrah.”
29. And as Isaiah had before said, etc. Isaiah 1:9. The words of the Septuagint are given literally, and differ only in one instance from the Hebrew; “seed” is put for “remnant;” but as “seed” in this case evidently means a small portion reserved for sowing, the idea of the original is conveyed.
Hosea foretold that those who were not God's people would be called His people, and the unloved would become beloved. A blessed change: former badness is no bar to present grace. Wherever the Gentiles scatter over the earth, God owns them as His children without requiring them to join the Jewish nation.
AI summary
Commenting on Romans 9:25-29
What shall we say then?.... To God's calling of a large number of the Gentiles, and only a very few of the Jews, according to his eternal purposes and decrees; what can be objected to it? is he chargeable with any unrighteousness? must it not be referred to his sovereign will and pleasure?