Romans 3:27 - Matthew Poole's English Annotations on the Holy Bible

Where is boasting then? the apostle doth, as it were, insult over them: q.d. Where is now the former boasting cf the Jews, as if they were so much better than the Gentiles? Or what is become of the ground of boasting, that they, or either of them, might think they had in the law, or philosophy, or any moral performances? See Jeremiah 9:23,24. It is excluded. By what law? of works? If it be inquired upon what account this boasting is excluded, we answer plainly, It cannot be by that law that commands works, as the condition of acceptance and justification, and tells us nothing by whom that condition should be fulfilled; the law being become weak to us, for such a purpose. by reason of sin, Romans 8:3. Nay: but by the law of faith; i.e. the gospel law which requires faith, by which the righteousness of Christ is imputed to us, and attained by us. And this is called a law of faith, as some think, in condescension to the Jews custom of speaking, who are so much delighted with the name of the law; and so that he might not be suspected of novelty: but, as most, it is a Hebraism, denoting no more than the doctrine or prescript of faith.