1 Corinthians 11:23-29
23 For I received from the Lord that which also I delivered to you, that the Lord Jesus on the night in which he was betrayed took bread.
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 manner 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.
29 For he who eats and drinks in an unworthy manner eats and drinks judgment to himself, if he doesn't discern the Lord's body.