《太平广记·卷四十九·神仙四十九》
当时是唐朝大中十二年戊寅年，这年回桐柏观，和道士说获得道术的缘由。
时大中十二年戊寅岁。是年归桐柏观，与道流话得道之由。
That was in the twelfth year of the Dazhong era of the Tang Dynasty, the year of wu-yin. He returned to the Tongbai Temple that year and told the Taoists the reason why he obtained the Tao.