法華玄論 9.94

9.94

Answer: The first comes from the Brahmajāla-sūtra; the next comes from the Sūtra on Resolving Doubts Concerning the Semblance Dharma and the Vajracchedikā-upadeśa; the next comes from what is expounded in the Mahāyānasaṃgraha; the next comes from the "Sun Parable" chapter of the Nirvāṇa [Sūtra]. The differences in the length of the three periods correspond to the differences in what is seen by Buddhas, bodhisattvas, and the two vehicles; the different names expounded in the sūtras still have the same intent.