瑜伽論記 1.471

1.471

問：由何七火方一水災？答：第二禪中小光天、壽二劫，無量光天、四劫，極光淨天、八劫。若一火後即起水災，彼天如何時壽八劫，由此即顯七水之後，復起七火方一風災，總顯八七火一七水、方風災成。第三禪少淨天、壽十六劫，無量淨天、三十二劫，遍淨天、六十四劫，八七火一七水、方一風，水火九七成六十三，後一風災成六十四，由是三災壞劫各別。

Question: Why are there seven fires before one water disaster? Answer: In the second dhyāna, the Parīttābha heaven has a lifespan of two kalpas, the Apramāṇābha heaven four kalpas, and the Ābhāsvara heaven eight kalpas. If a water disaster arose right after one fire, how could that heaven have a lifespan of eight kalpas? From this it is shown that after seven waters, seven fires arise again before one wind disaster; in total, it shows that eight-times-seven fires and one-time-seven waters occur before the wind disaster is completed. In the third dhyāna, the Parīttaśubha heaven has a lifespan of sixteen kalpas, the Apramāṇaśubha heaven thirty-two kalpas, and the Śubhakṛtsna heaven sixty-four kalpas. Eight-times-seven fires and one-time-seven waters precede one wind; waters and fires, nine sevens, make sixty-three, and the final wind disaster makes sixty-four. Hence the destruction kalpas of the three disasters are each distinct.