Hullin 106: How Ritual Handwashing Protects

Rav Dimi tells the story of how not washing before the meal in the ceremonial washing that precedes a meal led to a Jew eating pork. Likewise, a story of a woman who ended up divorced because of not washing after the meal. Another version of the story -- replace "pork" with non-kosher meat and "divorce" with death. Also, the difference between ritual washing and washing for cleanliness, or washing for produce. Plus, the proper way to wash your hands for eating regular meat, in contrast to the extra washing done for terumah.