2 John 1:1; 2 John 1:9

1 The elder unto the elect lady and her children, whom I love in the truth; and not I only, but also all they that have known the truth;
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.