1 Corinthians 11:21 (KJV)

But if any man seem to be contentious, we have no such custom, neither the churches of God.

Now in this that I declare unto you I praise you not, that ye come together not for the better, but for the worse.

For first of all, when ye come together in the church, I hear that there be divisions among you; and I partly believe it.

For there must be also heresies among you, that they which are approved may be made manifest among you.

When ye come together therefore into one place, this is not to eat the Lord's supper.

What? have ye not houses to eat and to drink in? or despise ye the church of God, and shame them that have not? What shall I say to you? shall I praise you in this? I praise you not.

For I have received of the Lord that which also I delivered unto you, That the Lord Jesus the same night in which he was betrayed took bread:

And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me.

After the same manner also he took the cup, when he had supped, saying, This cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me.

For as often as ye eat this bread, and drink this cup, ye do shew the Lord's death till he come.