1 Corinthians 11:25-29

25In like manner also the cup, after having supped, saying, This cup is the new covenant in my blood: this do, as often as ye shall drink [it], in remembrance of me.

26For as often as ye shall eat this bread, and drink the cup, ye announce the death of the Lord, until he come.

27So that whosoever shall eat the bread, or drink the cup of the Lord, unworthily, shall be guilty in respect of the body and of the blood of the Lord.

28But let a man prove himself, and thus eat of the bread, and drink of the cup.

29For [the] eater and drinker eats and drinks judgment to himself, not distinguishing the body.