What does the Bible say about the Eucharist?

The Bible presents the Eucharist through the Last Supper accounts, John 6's Bread of Life discourse, and Pauline teaching. Jesus identifies the bread and cup as His Body and Blood, instituting a perpetual memorial sacrifice that the Church understands as His true, real, and substantial presence under the appearances of bread and wine.

The Bread of Life Discourse

This discourse grounds the Catholic doctrine of the Real Presence (CCC 1374). Christ's flesh and blood are truly received by those who eat and drink worthily, giving eternal life.