John Chrysostom — as excerpted in the Catena Aurea on John 6:41-46

“(Hom. xlvi. 1) The Jews, so long as they thought to get food for their carnal eating, had no misgivings; but when this hope was taken away, then, we read, the Jews murmured at Him because He said, I am the bread which came down from heaven. This was only a pretence. The real cause of their complaint was that they were disappointed in their expectation of a bodily feast. As yet however they reverenced Him, for His miracle; and only expressed their discontent by murmurs. What these were we read next: And they said, Is not this Jesus, the Son of Joseph, whose father and mother we know? how is it then that He saith, I came down from heaven?”