The philosophical and mathematical commentaries of Proclus on the first book of Euclid's elements (Vol. 1 of 2) : $b To which are added, A history of the restoration of Platonic theology, by the latter Platonists: And a translation from the Greek of Proclus's Theological elements
Plato · en
In the mean time, it was not lawful for any one to taste of the
aliment, whether solid or fluid, which was brought into Egypt from
foreign parts. They likewise abstained from the fish which Egypt
produced; and from all quadrupeds having solid or many fissured hoofs;
from such as were without horns; and from all carniverous birds: but
many of them abstained entirely from animal food. And at those times
when they all rendered themselves pure, they did not even eat an egg.
But when the time drew near in which they were to celebrate some sacred
rites, or festival, they employed many days in previous preparation,
some of them setting apart forty-two days, others a greater length
of time than this; and others again a shorter; but never less than
seven days; abstaining, during this period, from all animals, and
from all leguminous and oily nutriment, but especially from venereal
congress. Every day, they washed themselves three times in cold water;
after rising from bed, before dinner, and when they betook themselves
to rest. And if they happened to be polluted in their sleep, they
immediately purified their bodies in a bath. They made cold water
too subservient to the purposes of purification at other times, but
not so often as the bath. Their beds were composed from the branches
of palm, which they called βαίς, _bais_. A piece of wood, of a
semi-cylindrical form, and well planed, served them for a pillow.
But through the whole of life, they were exercised in the endurance
of hunger and thirst, and accustomed to a paucity and simplicity of
nutriment.