Romans 9:25

Our apostle having hitherto vindicated the wisdom and righteousness of God in the rejection of the Jews, and calling of the Gentiles; lest the Jews should stumble and take offence at it, in these and the following verses he proves, that the calling of the Gentiles was long before foretold, both by the prophet Hosea, and the prophet Isaiah; by the prophet Hosea,

I will call them my people, which were not my people. Hosea 2:23

And, Instead of, ye are not my people, it shall be said, ye are the sons of the living God. Hosea 1:10

Which expressions signify and import God's receiving the Gentiles into the church as an act of free and undeserved mercy, whom the Jews looked upon as castaways, as strangers, as dogs; accounting themselves only to be of his family and household. Next he produces the testimony of Isaiah.