3 John 1:9-10

9I wrote something to the church, but Diotrephes, who loves to have first place among them, does not receive our authority.

10This is why, if I come, I will remind him of the works he is doing, slandering us with malicious words. And he is not satisfied with that! He not only refuses to welcome fellow believers, but he even stops those who want to do so and expels them from the church.