1 Corinthians 11:26-29

Whenever you eat this bread and drink this cup, you are retelling the story, proclaiming our Lord’s death until he comes. For this reason, whoever eats the bread or drinks the cup of the Lord in the wrong spirit will be guilty of dishonoring the body and blood of the Lord. So let each individual first evaluate his own attitude and only then eat the bread and drink the cup. For continually eating and drinking with a wrong spirit will bring judgment upon yourself by not recognizing the body.