No explicit regulations are expressed in the bible concerning the treatment of a corpse itself, although historic rabbinical sources saw an implication that the dead should be thoroughly washed per Ecclesiastes,[19] as children are washed when born;[20] according to Raavyah, a prominent rishon, argued that the corpse should be cleansed carefully, including the ears and fingers, with nails pared and hair combed, so that the corpse could be laid to rest in the manner that the person had visited the synagogue during life.[3] Washing of corpses was not observed among the Jews living in Persian Babylon, for which they were criticised as dying in filth, without a candle and without a bath;[21] at the time, the non-Jewish Persians were predominantly Zoroastrian, and consequently believed that dead bodies were inherently ritually unclean, and should be exposed to the elements in a Tower of Silence to avoid defiling the earth with them.