1 Corinthians 11:28

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.”

For as often as you eat this bread and drink this cup, you proclaim the Lord’s death until he comes.

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.

For he who eats and drinks in an unworthy way eats and drinks judgment to himself if he doesn’t discern the Lord’s body.

For this cause many among you are weak and sickly, and not a few sleep.

For if we discerned ourselves, we wouldn’t be judged.