NET
9 Everyone who goes on ahead and does not remain in the teaching of Christ does not have God. The one who remains in this teaching has both the Father and the Son.
Darby
9 Whosoever goes forward and abides not in the doctrine of the Christ has not God. He that abides in the doctrine, *he* has both the Father and the Son.
KJV
9 Whosoever transgresseth, and abideth not in the doctrine of Christ, hath not God. He that abideth in the doctrine of Christ, he hath both the Father and the Son.