Romans 10:12-14 New Revised Standard Version (NRSV)
12 For there is no distinction between Jew and Greek; the same Lord is Lord of all and is generous to all who call on him. 13 For, “Everyone who calls on the name of the Lord shall be saved.”
14 But how are they to call on one in whom they have not believed? And how are they to believe in one of whom they have never heard? And how are they to hear without someone to proclaim him?