法苑珠林 63.85

63.85

又涅槃經云。佛言。善男子。雪山有草。名曰忍辱。牛若食之。則成醍醐。

The Mahāparinirvāṇa-sūtra also states: The Buddha said: "Good sons, on the Snowy Mountains there is a grass named Forbearance. If a cow eats it, it produces ghee."