經律異相 1.90

1.90

佛言。設方百由旬城滿中芥子。有長壽人百歲。取一芥子都盡。劫猶不盡。又如方百由旬石。持迦尸輕軟疊衣。百年一拂此石脫盡劫猶不盡。謂之大劫也。又言。方一由旬高下亦然。鐵城滿中芥子。百年取一盡為一劫。又方一由旬石山。士夫以迦尸衣百年一拂。拂之不已石山銷盡。劫猶未竟。六十念中之一念。謂極小劫也（出大智論第三十六卷又出增一阿含第三十一卷又出第二十八卷又出雜阿含第三十四卷）。

The Buddha said: "Suppose there were a city one hundred yojanas square filled with mustard seeds, and a long-lived person came every hundred years and took away a single mustard seed until all were exhausted—the kalpa would still not be exhausted. Furthermore, suppose there were a stone one hundred yojanas square, and one held a light, soft Kāśi cloth and brushed this stone once every hundred years until it wore away completely—the kalpa would still not be exhausted. This is called a great kalpa." He also said: "Suppose there were an iron city one yojana square and equally high, filled with mustard seeds; if one took away one seed every hundred years until all were gone, that would make one kalpa. Furthermore, suppose there were a stone mountain one yojana square, and a man brushed it once every hundred years with a Kāśi cloth; if he brushed it unceasingly until the stone mountain was worn away completely, the kalpa would still not be finished. One thought-moment out of sixty thought-moments is called an extremely small kalpa." (From the Da zhidu lun, fascicle 36; also from the Ekottarika-āgama, fascicle 31; also from fascicle 28; also from the Saṃyukta-āgama, fascicle 34.)