1 Corinthians 11

24 When he had given thanks, he broke it and said, "Take, eat. This is my body, which is broken for you. Do this in memory of me." 25 In the same way he also took the cup after supper, saying, "This cup is the new covenant in my blood. Do this, as often as you drink, in memory of me." 26 For as often as you eat this bread and drink this cup, you proclaim the Lord’s death until he comes.

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.