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Resources - The Mikveh
The Jewish religion is very strong on cleanliness, and ritual cleanliness of people (as well as, for example, food) is very imporant as a result.
The Mikveh is a ritual washing bath used by, amongst others,
  • Women during their menstruation
  • Soferim before writing the name of G-d
  • Men after a seminal emmission
  • or anyone who has come into contact with a dead body.

A Mikveh must be of running water - the largest Mikveh is the Pacific Ocean - and all parts of the body must be cleaned thoroughly - there are people there to inspect whether or not the whole body has been washed!