1 Corinthians 11:25-27

New Revised Standard Version Catholic Edition

²⁵ In the same way he took the cup also, after supper, saying, “This cup is the new covenant in my blood. Do this, as often as you drink it, in remembrance of me.” ²⁶ For as often as you eat this bread and drink the cup, you proclaim the Lord’s death until he comes.

Partaking of the Supper Unworthily

²⁷ Whoever, therefore, eats the bread or drinks the cup of the Lord in an unworthy manner will be answerable for the body and blood of the Lord.