Here the apostle proves, that the Gentiles were children of the Promise, or that the promise belonged to them, as well as to the Jews: and because the Jews could not endure to hear of this, he cites two testimonies out of Hosea, to convince them: one is in this verse, and it is taken out of Hosea 2:23; the other is in the following verse.
Related Commentaries of Romans 9:25
Romans 9:25
25 As he saith also in Osee, I will call them my people, which were not my people; and her beloved, which was not beloved.