23For I received from the Lord what I also passed on to you: The Lord Jesus, on the night he was betrayed, took bread, 24and when he had given thanks, he broke it and said, “This is my body, which is for you; do this in remembrance of me.” 25In the same way, after supper he took the cup, saying, “This cup is the new covenant in my blood; do this, whenever you drink it, in remembrance of me.” 26For whenever you eat this bread and drink this cup, you proclaim the Lord’s death until he comes.

27Therefore, whoever eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty of sinning against the body and blood of the Lord. 28A man ought to examine himself before he eats of the bread and drinks of the cup. 29For anyone who eats and drinks without recognizing the body of the Lord eats and drinks judgment on himself. 30That is why many among you are weak and sick, and a number of you have fallen asleep. 31But if we judged ourselves, we would not come under judgment. 32When we are judged by the Lord, we are being disciplined so that we will not be condemned with the world.

33So then, my brothers, when you come together to eat, wait for each other. 34If anyone is hungry, he should eat at home, so that when you meet together it may not result in judgment.
And when I come I will give further directions.

1 Corinthians 10:16-17
16Is not the cup of thanksgiving for which we give thanks a participation in the blood of Christ? And is not the bread that we break a participation in the body of Christ? 17Because there is one loaf, we, who are many, are one body, for we all partake of the one loaf.