高僧傳 10.38

10.38

時長安人王胡，其叔死數年，忽見形還，將胡遍遊地獄，示諸果報。胡辭還，叔謂胡曰：「既已知因果，但當奉事白足阿練。」胡遍訪眾僧，唯見始足白於面，因而事之。

At that time, there was a man of Chang'an named Wang Hu. His uncle had been dead for several years when he suddenly manifested his form, returned, and led Hu all around the narakas, showing him various karmic retributions. When Hu took his leave to return, his uncle said to Hu, "Now that you know cause and effect, you must only serve the White-Footed Āraṇyaka." Hu searched all the monks, and only found that Shi's feet were whiter than his face, and thereupon served him.