2 John 1:10-12

10 If someone comes to you and does not bring this teaching, don’t welcome him into your home. Don’t even say, “Shalom!” to him;

11 for the person who says, “Shalom!” to him shares in his evil deeds.

12 Although I have much to write you people, I would rather not use paper and ink. Instead, I hope to come and see you and to talk with you face to face, so that our joy may be complete.