瑜伽論記 9.431

9.431

婆沙亦云：眾出者，如聲聞。第三上品是百劫，顯百劫滿已於最後身出無佛世，依第四定起不淨觀乃至盡漏。

The Mahāvibhāṣā also says: 'Those who emerge in a group are like śrāvakas.' The third, superior grade is of a hundred kalpas; it indicates that after completing a hundred kalpas, they emerge in their final body in an age without a Buddha, rely on the fourth dhyāna to give rise to the contemplation of impurity, and so on up to exhausting the taints.