And had rained down manna upon them to eat - Exodus 16:4-5, Exodus 16:14; Numbers 11:7-9. Compare the notes at John 6:31.
And had given them of the corn of heaven - Food that seemed to come down from heaven. The reference here is to the manna, and it is called corn in the sense that it was food, or that it supplied the place of grain. It may also have been called corn from its resemblance to grain. See Exodus 16:31.