1 Corinthians 11:16-19

16If anyone is inclined to dispute this, we have no other practice, nor do the churches of God.

17In the following instructions I have no praise to offer, because your gatherings do more harm than good. 18First of all, I hear that when you come together as a church, there are divisions among you, and in part I believe it. 19And indeed, there must be differences among you to show which of you are approved.