1 Corinthians 11:26-29

ISV(i) 26 For as often as you eat this bread and drink from this cup, you proclaim the Lord’s death until he comes.
27 Therefore, whoever eats the bread or drinks from the cup in an unworthy manner will be held responsible for the Lord’s body and blood. 28 A person must examine himself and then eat the bread and drink from the cup, 29 because whoever eats and drinks without recognizing the body, eats and drinks judgment on himself.