1 Corinthians 10:3-4

10:3 and all ate the same spiritual food, 10:4 and all drank the same spiritual drink. For they were all drinking from the spiritual rock that followed them, and the rock was Christ.

1 Corinthians 10:21

10:21 You cannot drink the cup of the Lord and the cup of demons. You cannot take part in the table of the Lord and the table of demons.

1 Corinthians 11:26-28

11:26 For every time you eat this bread and drink the cup, you proclaim the Lord’s death until he comes.

11:27 For this reason, whoever eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty of the body and blood of the Lord. 11:28 A person should examine himself first, ¹  and in this way ²  let him eat the bread and drink of the cup.

[11:28]  ¹ tn The word “first” is not in the Greek text, but is implied. It has been supplied in the translation for clarity.

[11:28]  ² tn Grk “in this manner.”