1 Corinthians 11:17, 25-26

But in the following instructions I do not commend you, because when you come together it is not for the better but for the worse.

In the same way also he took the cup, after supper, saying, “This cup is the new covenant in my blood. Do this, as often as you drink it, in remembrance of me.” For as often as you eat this bread and drink the cup, you proclaim the Lord’s death until he comes.