Romans 15:8 - Matthew Poole's English Annotations on the Holy Bible

He explains himself, and declares more at large, how Christ received both Jews and Gentiles, thereby to admonish them to receive one another. As for the Jews, whom he calls here the circumcision, see Romans 3:30, Romans 4:9,12, he saith, Christ became a minister unto them; see Matthew 20:28. He exercised his ministry in the days of his flesh amongst them only, Matthew 15:24. He went indeed now and then into the coasts of Samaria to make way for the calling of the Gentiles, but his chief abode was in Jewry. For the truth of God; or, because of the truth of God, that his truth or faithfulness might not fail. To confirm the promises made to the fathers; i.e. the promises of the Messiah, made first to Adam, then to Abraham and to David, that the Messiah should come of their loins, that in their seed all the nations of the earth should be blessed.