1 Corinthians 11:23-29

After all, I passed on to you what I had received from the Lord. On the night he was betrayed, the Lord Jesus took bread and spoke a prayer of thanksgiving. He broke the bread and said, “This is my body, which is given for you. Do this to remember me.” When supper was over, he did the same with the cup. He said, “This cup is the new promise  made with my blood. Every time you drink from it, do it to remember me.” Every time you eat this bread and drink from this cup, you tell about the Lord’s death until he comes. Therefore, whoever eats the bread or drinks from the Lord’s cup in an improper way will be held responsible for the Lord’s body and blood. With this in mind, individuals must determine whether what they are doing is proper when they eat the bread and drink from the cup. Anyone who eats and drinks is eating and drinking a judgment against himself when he doesn’t recognize the Lord’s body.