John Trapp on Psalms 78:24

Verſ. 24. And had rained down Manna upon them] Manna ſignifieth, what's this? whereunto in the Allegory anſwereth, This is my body. Or, according to others, it ſignifieth a prepared portion, prepared by God, ſo that they might preſently eat of it, though they might grinde, or pun, or bake, or boil it alſo, they might do any thing with it, as they might with meal; whence it is here called the corn of heaven, that is, a ſeed which was unto them in ſtead of corn.