The Promise of a Remnant

"This promise of the conversion and salvation of a remnant of Israel is applied by the apostle to the remnant of the Jews which at the first preaching of the gospel received and entertained it, and sufficiently proves that it was no new thing for God to abandon to ruin a great many of the seed of Abraham in full force and virtue; for so it was now. The number of the children of Israel was as the sand of the sea (according to the promise, and yet only a remnant shall be saved." - Matthew Henry