佛說觀佛三昧海經 8.23

8.23

佛告阿難：「我昔初成道時，伽耶城邊住熙連河側，有五尼揵。第一尼揵名薩闍多，五百徒眾；餘四各有二百五十弟子。時諸尼揵自稱得道，來至我所，以其身根繞身七匝，來至我所敷草而坐，即作是語：『瞿曇！我無欲故梵行相成，我之身根乃能如此如自在天，我今神通過踰沙門百千萬倍，沙門作一我當作二。』即於地中化作一樹，以其身根絞繞著樹，滿七匝已，令樹雲霧如龍王氣，高聲大喚舉手唱言：『瞿曇！我梵行相事驗如此，汝稱男子，言大丈夫，以何為證？』

The Buddha said to Ānanda: "Formerly, when I had just attained awakening, I stayed by the bank of the Nairañjanā River near the city of Gayā. There were five nirgranthas. The first nirgrantha was named Sajjāta, who had five hundred followers; the remaining four each had two hundred and fifty disciples. At that time, these nirgranthas claimed to have attained the Way and came to where I was. Wrapping their organs seven times around their bodies, they came to where I was, spread grass, sat down, and spoke these words: 'Gautama! Because I am free from desire, the mark of brahma-practice has been accomplished in me. My organ can do this, like that of Maheśvara. My spiritual powers now surpass those of the recluse by hundreds of thousands of times. If the recluse does one thing, I will do two.' Immediately, out of the earth he conjured a tree, wound his organ around the tree for a full seven turns, and caused clouds and mist to emerge from the tree like the breath of a dragon king. Raising his voice in a loud shout and holding up his hands, he proclaimed: 'Gautama! The mark of my brahma-practice is verified like this! You call yourself a man and say you are a great man—what proof do you have?'