1 Corinthians 11:28 in the King James Version
But let a man examine himself, and so let him eat of that bread, and drink of that cup.
Context
27 Therefore whoever eats this bread or drinks the Lord’s cup in a way unworthy of the Lord will be guilty of the body and the blood of the Lord.
28 But let a man examine himself, and so let him eat of the bread and drink of the cup.
29 For he who eats and drinks in an unworthy way eats and drinks judgment to himself if he doesn’t discern the Lord’s body.