The Dàodéjīng (Tao Te King, Tao Te Ching) is a collection of sayings which, according to Chinese legend, comes from a sage named Laozi, who disappeared in the western direction after writing it down. The Dàodéjīng is one of the basic texts of Daoism.
Read more: https://en.wikipedia.org/wiki/Tao_Te_Ching