Romans 6:6 (NIV)

For we know that our old self was crucified with him so that the body ruled by sin might be done away with, that we should no longer be slaves to sin

Romans 10:9-11

9. If you declare with your mouth, “Jesus is Lord,” and believe in your heart that God raised him from the dead, you will be saved.

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.

11. As Scripture says, “Anyone who believes in him will never be put to shame.

Romans 10:9-10 (NKJV)

9. that if you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved.  10. For with the heart one believes unto righteousness, and with the mouth confession is made unto salvation. 

Romans 3:10-12

10 As it is written:

“There is no one righteous, not even one;
11     there is no one who understands;
    there is no one who seeks God.
12 All have turned away,
    they have together become worthless;
there is no one who does good,
    not even one.”