1 Corinthians 11:26–30

26 For whenever you eat this bread and drink this cup, you proclaim the Lord’s death until he comes.

27 Therefore, 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. 28 A man ought to examine himself before he eats of the bread and drinks of the cup. 29 For anyone who eats and drinks without recognizing the body of the Lord eats and drinks judgment on himself. 30 That is why many among you are weak and sick, and a number of you have fallen asleep.