Augustine of Hippo

When the holy apostle wished to show that the prophets had foretold the coming of those times when it should come to pass that all nations would believe in God, he cited the testimony that reads, "And it shall come to pass that everyone who calls on the name of the Lord shall be saved." For the name of God who has made heaven and earth used to be invoked among the Israelites only. The rest of the nations used to call upon deaf and dumb idols and were not heard by them; or they invoked demons and were heard to their own harm. "But when the fullness of time had come," then was fulfilled what had been foretold. "And it shall come to pass, that everyone who calls upon the name of the Lord shall be saved." Hence the Jews—even those of them who believed in Christ—begrudged the gospel of the Gentiles and maintained that the gospel of Christ ought not to be preached to the uncircumcised.