佛祖統紀 30.28

30.28

According to the Fazhu ji, the Buddha told Ānanda: 'After my parinirvāṇa, the True Dharma will last for 1,000 years. Because of women renouncing household life, it is reduced by 500 years; the Semblance Dharma will last 1,000 years, and the Final Dharma 10,000 years.' The Shanjian lun states that initially the Buddha did not deliver women, but later expounded the eight guru-dharmas for them, so that 1,000 years were regained. The Fayuan [zhulin] states that a deva answered Nanshan: 'The Buddha's khakkhara staff is in a dragon cave, where it has stayed for forty years. Because after the Tathāgata's departure there would be flying rākṣasas able to recite the twelve divisions of scriptures who falsely pose as good bhikṣus and devour four hundred precept-holders daily, it was placed to suppress them in the dragon cave to cut off this evil. This furthermore caused the True Dharma to remain for an additional 400 years, the Semblance Dharma to increase by 1,500 years, and the Final Dharma to increase by 20,000 years.'