During the reign of Tang Zetian (i.e., Wu Zetian, r. 690-705 CE), there was a woman who called herself Saint Bodhisattva. Wherever a person’s mind went, this woman would always know. The Empress Dowager summoned her to court, and everything she said before and after were verified, so she was served with great respect in the palace. After several months, she came to be called the True Bodhisattva. After that the monk Da An entered the palace. The Empress Dowager asked him whether or not he had met the female Bodhisattva. An replied: “Where is the Bodhisattva? I would like to see her.” It was decreed that they should meet. The monk took on a lofty and distant demeanour. After a long pause, Dan An asked: “If you have skill in mental contemplation, try and see. Where is my mind?” The answer came: “The master’s mind is among the bells by the nine rings at the top of the pagoda.” After a little while, he asked again. She said: “Listening to the Dharma in the Tushita Maitreya Temple.” When he asked for a third time, he was beyond thinking or not-thinking. All were as she said. The Empress Dowager was delighted. Da An therefore placed his mind among the land of the four Arhat saints, and so she was not able to find it. Da An scolded the woman: “My mind was placed in the place of the Arhats, and you were no longer able to find it. If you were among the Bodhisattvas, how could this be the case?” The woman said she submitted, but then transformed into a female fox, descended the stairs and departed; nobody knows where she went.
Li Fang 李昉, et al., Taiping guangji 太平廣記 (Extensive Gleanings from the Era of Great Harmony), 10 vols (Beijing: Zhonghua shuju, 1961), ix, 447.3660:
*Translation edited after feedback from Ofer Waldman – thanks Ofer!*