1 Corinthians 10:16

The chalice of benediction, [2] &c. Which the priests bless or consecrate, is it not the communion of the blood of Christ? And the bread which we break, (so called because of the outward appearance of bread) is it not the partaking or communion of the body of the Lord? See St. John Chrysostom here, hom. xxiv. p. 396. and p. 400. See also the Annotations, Matthew xxvi. 26. (Witham) --- Here the apostle puts them in mind of the partaking of the body and blood of Christ in the sacred mysteries, and becoming thereby one mystical body with Christ. From whence he infers, (ver. 21.) that they who are made partakers with Christ, by the eucharistic sacrifice, and sacrament, must not be made partakers with devils, by eating of the meats sacrificed to them. (Challoner)

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Calix benedictionis cui, (or as it is in the Greek) quem benedicimus. See St. John Chrysostom, hom. xxiv. No Catholic now-a-days can declare his faith of the real presence in clearer terms than St. John Chrysostom hath in this, and other places: Greek: oti touto en to poterio on, ekeino esti, to apo tes pleuras reusan, &c. He calls the eucharist, Greek: thusian, a sacrifice.