2 John 1:6-7; 2 John 1:10
And this is love, that we walk according to His commandments. This is the commandment, just as you have heard from the beginning, that you should walk in it.
For many deceivers have gone out into the world, those who do not acknowledge Jesus Christ as coming in the flesh. This is the deceiver and the antichrist.
If anyone comes to you and does not bring this teaching, do not receive him into your house, and do not give him a greeting;