Romans 10:9
“That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.”
Or, Who shall descend into the deep? (that is, to bring up Christ again from the dead.)
But what saith it? The word is nigh thee, even in thy mouth, and in thy heart: that is, the word of faith, which we preach;
That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.
For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
For the scripture saith, Whosoever believeth on him shall not be ashamed.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“He that believeth and is baptized shall be saved; but he that believeth not shall be damned.”
“Also I say unto you, Whosoever shall confess me before men, him shall the Son of man also confess before the angels of God:”
“And they said, Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house.”
“And that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father.”
“For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:”