2 John 1:7-9

7 because many leading astray did enter into the world, who are not confessing Jesus Christ coming in flesh; this one is he who is leading astray, and the antichrist.

8 See to yourselves that ye may not lose the things that we wrought, but a full reward may receive;

9 every one who is transgressing, and is not remaining in the teaching of the Christ, hath not God; he who is remaining in the teaching of the Christ, this one hath both the Father and the Son;