1 Corinthians 11:27-31
27Wherefore whosoever shall eat this bread, and drink this cup of the Lord, unworthily, shall be guilty of the body and blood of the Lord.
28But let a man examine himself, and so let him eat of that bread, and drink of that cup.
29For he that eateth and drinketh unworthily, eateth and drinketh damnation to himself, not discerning the Lord's body.
30For this cause many are weak and sickly among you, and many sleep.
31For if we would judge ourselves, we should not be judged.
(KJV)