Romans 10:9-11
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.”
10 “For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.”
11 “For the scripture saith, Whosoever believeth on him shall not be ashamed.”
1 John 4:2,3,15
2 “Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God:”
3 “And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world.”
15 “Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God.”
Matthew 10:33
33 “But whosoever shall deny me before men, him will I also deny before my Father which is in heaven.”
