For as often as you eat this bread and drink the chalice, you proclaim the Lord’s death until he comes. — 1 Cor 11:26
The gift of the Eucharist and the celebration of the sacrificial banquet always include the offering of bread and wine. It has always been essential to the celebration of the Sacrament that the priest offering the Mass receives both the Sacred Body and Precious Blood. The practice of the early Church was to offer the laity communion under both kinds as well. This practice eventually fell out of use for numerous reasons by the 12th century (“Norms for the Distribution and Reception of Holy Communion Under Both Kinds,” 17-18).