諸經要集 20.71

20.71

Furthermore, the Xianyu jing states: When the Buddha was in the world, beside the city of Rājagṛha there was a pool of water, muddy and impure, with much excrement and filth, into which the people of the country cast their feces and urine. In it was a great worm, shaped like a snake but with four legs, which scurried east and west in the pool of water, sometimes submerging and sometimes emerging, for many years, constantly dwelling therein and enduring boundless suffering. At that time, the Bhagavat led the monks to that pit and asked the monks: 'Do you recognize the past causes and deeds of this worm?' The monks all did not know.