Romans 10:10

10 For it is with your heart that you believe and are justified, and it is with your mouth that you profess your faith and are saved.

Read Romans 10:10 Using Other Translations

For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
For with the heart one believes and is justified, and with the mouth one confesses and is saved.
For it is by believing in your heart that you are made right with God, and it is by openly declaring your faith that you are saved.