1 Corinthians 11:25-27

King James Version

²⁵ After the same manner also he took the cup, when he had supped, saying, this cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me.

²⁶ For as often as ye eat this bread, and drink this cup, ye do shew the Lord's death till he come.

²⁷ Wherefore whosoever shall eat this bread, and drink this cup of the Lord, unworthily, shall be guilty of the body and blood of the Lord.