《水经注·卷三十一》
道士在这里清身沐浴，一日喝三次水―喝多少随各人心意―四十日后，身上百病俱愈，三虫死尽。
道士清身沐浴，一日三饮，多少自在。四十日后，身中万病愈，三虫死。
Taoist priests cleanse themselves here, drink water three times a day — they drink as much as they want — and after forty days, all their diseases are cured, and the three insects die.