Romans 1:17

1:17 For the righteousness of God is revealed in the gospel from faith to faith, just as it is written, “The righteous by faith will live.”

Romans 10:16-17

10:16 But not all have obeyed the good news, for Isaiah says, “Lord, who has believed our report?” 10:17 Consequently faith comes from what is heard, and what is heard comes through the preached word of Christ.