Matthew 26:26-28

26. While they were eating, Jesus took bread, gave thanks and broke it, and gave it to his disciples, saying, "Take and eat; this is my body."
27. Then he took the cup, gave thanks and offered it to them, saying, "Drink from it, all of you.
28. This is my blood of the covenant, which is poured out for many for the forgiveness of sins.

I Corinthians 11:23-32

23. For I received from the Lord what I also passed on to you: The Lord Jesus, on the night he was betrayed, took bread,
24. and when he had given thanks, he broke it and said, "This is my body, which is for you; do this in remembrance of me."
25. In the same way, after supper he took the cup, saying, "This cup is the new covenant in my blood; do this, whenever you drink it, in remembrance of me."
26. For whenever you eat this bread and drink this cup, you proclaim the Lord's death until he comes.
27. Therefore, whoever eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty of sinning against the body and blood of the Lord.
28. A man ought to examine himself before he eats of the bread and drinks of the cup.
29. For anyone who eats and drinks without recognizing the body of the Lord eats and drinks judgment on himself.
30. That is why many among you are weak and sick, and a number of you have fallen asleep.
31. But if we judged ourselves, we would not come under judgment.
32. When we are judged by the Lord, we are being disciplined so that we will not be condemned with the world.