瑜伽論記 1.447

1.447

According to the Hīnayāna, the first nineteen of the dwelling kalpas have the three small calamities, because the twentieth kalpa has only a single ascent and no decrease, and hence no calamity arises. Now according to the Mahāyāna, there are twenty decreases and twenty increases, and therefore all twenty kalpas manifest small calamities.