Excerpt:
"But woolen articles are never taken into temples, nor are (the Egyptians) buried with them. That is not lawful. They agree in this with the so-called Orphic and Bacchic practices (which are really Egyptian) and with the Pythagoreans. For it is not lawful for one who partakes in these rites to be buried in woolen clothes. There is a sacred account given on this subject."
(Herodotus Histories II. 81)