釋氏稽古略 2.111

2.111

The Daoist priest Kou Qianzhi of Mount Song practiced the arts of Celestial Master Zhang. He said of himself that he had once met Laozi descending to bestow upon him the arts of abstaining from grain and lightening the body, as well as twenty fascicles of codes and precepts, instructing him to purify and regulate the Daoist teaching. Qianzhi presented the scriptures and offered them to the Wei ruler, but neither the court nor the public believed it. Only Cui Hao, Grand Master for Splendid Happiness on the Left, took him as a teacher, received his arts from him, and furthermore submitted a memorial praising and clarifying the matter. The Wei ruler was delighted, and sent a palace receptionist bearing jade, silk, and sacrificial beasts to sacrifice at Mount Song, welcoming Qianzhi. (History of the Northern Dynasties)