John Chrysostom — as excerpted in the Catena Aurea on John 6:22-27

“(Hom. xliv. 1) After the rebuke, however, He proceeds to teach them: Labour not for the meat which perisheth, but for that meat which endureth unto everlasting life; meaning, Ye seek for temporal food, whereas I only fed your bodies, that ye might seek the more diligently for that food, which is not temporary, but contains eternal life.”