1 Corinthians 11:27-29

New Century Version

²⁷ So a person who eats the bread or drinks the cup of the Lord in a way that is not worthy of it will be guilty of sinning against the body and the blood of the Lord. ²⁸ Look into your own hearts before you eat the bread and drink the cup, ²⁹ because all who eat the bread and drink the cup without recognizing the body eat and drink judgment against themselves.