Cyprian of Carthage

(ubi sup.) For Christ is the bread of life, and this bread belongs not to all men, but to us. This bread we pray that it be given day by day, lest we who are in Christ, and who daily receive the Eucharist for food of salvation, should by the admission of any grievous crime, and our being therefore forbidden the heavenly bread, be separated from the body of Christ. Hence then we pray, that we who abide in Christ, may not draw back from His sanctification and His body.