Tertullian

For the occasion, indeed, of claiming Divine grace even for the Gentiles derived a pre-eminent fitness from this fact, that the man who set up to vindicate CoWs Law as his own was of the Gentiles, and not a Jew "of the stock of the Israelites." For this fact-that Gentiles are admissible to God's Law-is enough to prevent Israel from priding himself on the notion that "the Gentiles are accounted as a little drop of a bucket," or else as "dust out of a threshing-floor: " although we have God Himself as an adequate engager and faithful promiser, in that He promised to Abraham that "in his seed should be blest all nations of the earth; " and that out of the womb of Rebecca "two peoples and two nations were about to proceed," -of course those of the Jews, that is, of Israel; and of the Gentiles, that is ours.