1st Corinthians 11:27

24 and having given thanks, he brake, and said, `Take ye, eat ye, this is my body, that for you is being broken; this do ye -- to the remembrance of me.`

25 In like manner also the cup after the supping, saying, `This cup is the new covenant in my blood; this do ye, as often as ye may drink [it] -- to the remembrance of me;`

26 for as often as ye may eat this bread, and this cup may drink, the death of the Lord ye do shew forth -- till he may come;

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

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

29 for he who is eating and drinking unworthily, judgment to himself he doth eat and drink -- not discerning the body of the Lord.

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