feasts of the passover

"The cause of the final plague, the death of the first borns of Egypt,
has been suggested as being caused by a fungus that may have poisoned
the grain supplies, of which male first born would have had first
pickings and so been first to fall victim."

"... with man hu meaning "this is plant lice", which fits one
widespread modern identification of manna, the crystallized honeydew
of certain scale insects. In the environment of a desert, such
honeydew rapidly dries due to evaporation of its water content,
becoming a sticky solid, and later turning whitish, yellowish, or
brownish; honeydew of this form is considered a delicacy in the Middle
East, and is a good source of carbohydrates."

"The speculation that manna was an entheogen, also paralleled in
Philip K. Dick's posthumously published The Transmigration of Timothy
Archer, is supported in a wider cultural context when compared with
the praise of soma in the Rigveda, Mexican praise of teonanácatl, the
peyote sacrament of the Native American Church, and the holy ayahuasca
used in the ritual of the União do Vegetal and Santo Daime
churches..."