2 John 1:10-11 If someone comes towards you and does not bear this doctrine, do not receive him into a house and do not say to greet him. For the one saying to him greeting, fellowships with his malignantly evil works.
Everyone transgressing and one not abiding in the doctrine of the Christ, does not have God. The one remaining in the doctrine, this one has also the Father and the Son.
Because many deceivers have entered the world, never confessing Jesus Christ, the one having come in flesh. This is the deceiver and the antichrist. 2 John 7