1 Corinthians 11:25-27

Williams(i) 25 In the same way, after supper, He took the cup of wine, saying, "This cup is the new covenant ratified by my blood. Whenever you drink it, do so in memory of me." 26 For every time you eat this bread and drink from this cup, you proclaim the Lord's death until He comes again. 27 So whoever eats the bread and drinks from the Lord's cup in an unworthy way is guilty of sinning against the Lord's body and blood.