The consumption of beans was prohibited by Pythagoras
and Plato to those who desired veracious dreams, as they tended
to inflate; and for the purpose of truthful dreaming, the animal
nature must be made to lie quiet. Cicero, however, laughed
at this prohibition, asking if it is the stomach and not the mind
with which one dreams.
Cunningham, Scott. Cunninghams Encyclopedia of Magical
Herbs. St. Paul, Minn. Llewellyn Publications, 1985.