1 Corinthians 10:16
Is not the cup of thanksgiving that we bless a participation in the blood of Christ? And is not the bread that we break a participation in the body of Christ? — The cup blessed and bread broken constitute koinōnia (communion, participation) in Christ's body and blood. The verbs eulogéō (bless) and klasō (break) are liturgical. Participation (koinōnia) is not merely symbolic memory but real presence and union.