If anyone acknowledges that Jesus is the Son of God, God lives in them and they in God.
NIV
Anyone who confesses (acknowledges, owns) that Jesus is the Son of God, God abides (lives, makes His home) in him and he [abides, lives, makes his home] in God.
AMP
Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God.
KJV