Romans 10:9 in the King James Version
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.
Context
8 But what does it say? “The word is near you, in your mouth and in your heart;” that is, the word of faith which we preach:
9 that if you will confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved.
10 For with the heart one believes resulting in righteousness; and with the mouth confession is made resulting in salvation.