1 Corinthians 11:25-26, 33

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.

Wherefore, my brethren, when ye come together to eat, tarry one for another.