佛祖統紀 40.56

40.56

○上遣中書侍郎徐嶠齎璽書召方士張果。入見時。刑和璞善算術。知人壽夭。算果莫能測。師夜光者善視鬼。上與果密坐。夜光不能見。上聞飲堇汁無苦者真奇士（音謹附子毒也）。與之三巵。醺然如醉。顧左右曰。非嘉酒也。取鐵如意擊墮其齒。皆燋黑。出神藥傳其齗。寢頃之齒粲然如故。後懇辭還山。下制曰。張果先生。志造高尚。迹混光塵。問以道樞。深會宗極。宜升銀青光祿大夫。號通玄先生。後入恒山。不知所終（果在梁陳時相智者兄陳鍼者）。

His Majesty sent the Vice Director of the Secretariat Xu Qiao carrying an imperial letter with the seal to summon the master of techniques Zhang Guo. When he entered for an audience, Xing Hepu, who was skilled in calculation and knew people's lifespans, calculated Guo's span but could not determine it. Shi Yeguang was skilled at seeing ghosts; when His Majesty sat secretly with Guo, Yeguang could not see him. His Majesty heard that one who drinks monkshood juice without suffering is a truly extraordinary man (monkshood juice is the poison of aconite). He gave him three cups. Guo appeared drunken and tipsy, looked to his attendants, and said, 'This is no fine wine.' He took an iron ruyi scepter and struck out his teeth, which were all charred and black. He took out divine medicine and applied it to his gums; after a short rest, his teeth were bright and white as before. Later, he earnestly declined office and returned to the mountains. An imperial edict was issued saying: 'Master Zhang Guo's aspiration reached loftiness, while his traces mingled with the dust of the world. Questioned on the pivot of the Dao, he deeply met the ultimate principle. It is fitting to promote him to Grand Master of the Silver-Blue Radiance with the Golden Seal and Purple Ribbon, titled Master of Penetrating Mystery (Tongxuan).' Later, he entered Mount Heng, and his end is unknown (Guo was the one who, during the Liang and Chen dynasties, read the physiognomy of Master Zhiyi's elder brother, Chen Zhen).