Romans 10:9-17 HCSB
If you confess with your mouth, “Jesus is Lord,” and believe in your heart that God raised Him from the dead, you will be saved. One believes with the heart, resulting in righteousness, and one confesses with the mouth, resulting in salvation. Now the Scripture says, Everyone who believes on Him will not be put to shame, for there is no distinction between Jew and Greek, since the same Lord of all is rich to all who call on Him. For everyone who calls on the name of the Lord will be saved.
But how can they call on Him they have not believed in? And how can they believe without hearing about Him? And how can they hear without a preacher? And how can they preach unless they are sent? As it is written: How beautiful are the feet of those who announce the gospel of good things! But all did not obey the gospel. For Isaiah says, Lord, who has believed our message? So faith comes from what is heard, and what is heard comes through the message about Christ.
HCSB: Holman Christian Standard Bible