Romans 9:25

As he saith. Paul always seeks to confirm his conclusions from the OT Scriptures, especially when they might appear to be disputable. Thus he now shows that both the calling of the Gentiles and the saving of only a remnant of Israel had been predicted by the prophets.

Osee. This is a transliteration of the Greek rendering of the Hebrew name “Hosea.”

I will call them. The quotation is from Hosea 2:23, though not identical with either the Hebrew or the LXX rendering. As quoted by Paul, the Greek words read literally, “I will call the not my people, my people and the not beloved, beloved.” For the meaning of Hosea’s statement in its original context see on Hosea 2:23; cf. on chapter 1:6, 9.