6 And this is charity, that we walk according to his commandments. For this is the commandment, that, as you have heard from the beginning, you should walk in the same:7 For many seducers are gone out into the world, who confess not that Jesus Christ is come in the flesh: this is a seducer and an antichrist.
8 Look to yourselves, that you lose not the things which you have wrought: but that you may receive a full reward.
9 Whosoever revolteth, and continueth not in the doctrine of Christ, hath not God. He that continueth in the doctrine, the same hath both the Father and the Son.
10 If any man come to you, and bring not this doctrine, receive him not into the house nor say to him, God speed you.
11 For he that saith unto him, God speed you, communicateth with his wicked works.
12 Having more things to write unto you, I would not by paper and ink: for I hope that I shall be with you, and speak face to face: that your joy may be full.
2 John 1, 6-13