1 Corinthians 11:28

25In like manner also the cup after the supping, saying, “This cup is the New Covenant in My blood; do this, as often as you may drink [it]—to the remembrance of Me”;

26for as often as you may eat this bread, and may drink this cup, you show forth the death of the LORD—until He may come;

27so that whoever may eat this bread or may drink the cup of the LORD unworthily, he will be guilty of the body and blood of the LORD:

28and let a man be proving himself, and so let him eat of the bread, and let him drink of the cup;

29for he who is eating and drinking unworthily, he eats and drinks judgment to himself—not discerning the body of the LORD.

30Because of this many [are] weak and sickly among you, and many sleep;

31for if we were discerning ourselves, we would not be being judged,