27 So then, 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.

References for 1 Corinthians 11:27

28 Everyone ought to examine themselves before they eat of the bread and drink from the cup.

References for 1 Corinthians 11:28

29 For those who eat and drink without discerning the body of Christ eat and drink judgment on themselves.