John Chrysostom
Catena Aurea · Johannesevangelium 6
Verily, verily, I say unto you, He that believeth on me hath everlasting life. I am that bread of life. Your fathers did eat manna in the wilderness, and are dead. This is the bread which cometh down from heaven, that a man may eat thereof, and not die. I am the living bread which came down from heaven: if any man eat of this bread, he shall live for ever.
(Hom. xlvi. 2) The addition, In the wilderness, is not put in without meaning, but to remind them how short a time the manna lasted; only till the entrance into the land of promise. And because the bread which Christ gave seemed inferior to the manna, in that the latter had come down from heaven, while the former was of this world, He adds, This is the bread which cometh down from heaven.