大般涅槃經義記 4.208

4.208

自下第三明興癈處，此經遍盛在南天竺，先喻後合，癈在罽賓。句別有四：一正明滅處，罽賓有王名彌羅堀，然付法中，師子比丘傳法人喪，故令法滅，此小滅處，大滅在於拘腅彌國；二明滅時人心不同，有信、不信；三明此經滅盡之時餘經悉滅。何故而然？以此經中具辨邪正，彰其佛說、魔說之別，有此經時邪不濫正，故令一切諸經得住，此經滅後邪說濫真，故令一切餘經悉滅；四告得法菩薩令知，欲使弘護，所以告之。

Below is the third part, clarifying the locations of flourishing and decline: This sūtra flourishes widely in South India—first the analogy, then the application—and declines in Jibin. There are four distinct clauses: First, directly clarifying the place of extinction: In Jibin there was a king named Mihirakula, and among those who transmitted the Dharma, the transmitter Bhikṣu Simha died, which caused the Dharma to perish; this is the minor place of extinction, while the major extinction is in Kauśāmbī. Second, clarifying that at the time of extinction people's minds are not the same, there being belief and disbelief. Third, clarifying that when this sūtra is completely extinguished, all other sūtras are extinguished as well. Why is this so? Because in this sūtra the correct and the corrupt are fully distinguished, demonstrating the difference between what the Buddha spoke and what Māra spoke. While this sūtra exists, the corrupt does not confound the correct, and therefore all sūtras are enabled to abide. After this sūtra is extinguished, corrupt teachings will confound the true, and therefore all other sūtras will be extinguished. Fourth, informing the bodhisattvas who have attained the Dharma so that they may know it, wishing to have them propagate and protect it; this is why he informs them.