佛祖統紀 35.145

35.145

Zuo Ci, seeing that the Han dynasty's mandate was about to end, entered Mount Tianzhu, studied the Dao, and obtained the Scripture of the Nine Elixirs of Gold Fluid in a stone chamber. He was able to transform in myriad ways. Cao Cao heard of him and summoned him, wishing to study under him. Zuo Ci said: 'Studying the Dao requires purity; it is not suitable for the exalted, defiled, and licentious.' Cao Cao wished to kill him. Someone saw Zuo Ci, cut off his head, and presented it; upon looking at it, it was merely a bundle of cogongrass. Later, Zuo Ci parted with his disciple Immortal Ge and went to Mount Huo, where he compounded the elixir and ascended as an immortal.