2 John 1:1; 2 John 1:9

2 John 1:1

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;

2 John 1:9

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.