3 John 1:6-10

and they have testified before the church of your love and friendship. You will do well to [assist them and] send them on their way in a manner worthy of God. For these [traveling missionaries] went out for the sake of the Name [of Christ], accepting nothing [in the way of assistance] from the Gentiles. So we ought to support such people [welcoming them as guests and providing for them], so that we may be fellow workers for the truth [that is, for the gospel message of salvation]. I 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. For 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.