John Lightfoot on John 6:32

[Moses gave you not that bread from heaven.] The Gemarists affirm that manna was given for the merits of Moses. "There were three good shepherds of Israel, Moses, Aaron, and Miriam: and there were three good things given us by their hands, a well, a cloud, and manna: the well, for the merits of Miriam; the pillar of the cloud, for the merits of Aaron; manna, for the merits of Moses."

Contrary, therefore, to this opinion of theirs, it may well be said, Moses did not give you this bread: i.e. it was by no means for any merits of his. But what further he might intend by these words, you may learn from the several expositors.