3 John 1:9-10

9I wrote something to the church; but Diotrephes, who loves to put himself first, does not accept what we say and refuses to recognize my authority.

10For this reason, if I come, I will call attention to what he is doing, unjustly accusing us with wicked words and unjustified charges. And not satisfied with this, he refuses to receive the [missionary] brothers himself, and also forbids those who want to [welcome them] and puts them out of the church.