俱舍論頌疏論本 29.36

29.36

釋曰：上兩句答初問，下兩句答第二問。正法有二：一教、二證。教謂契經、調伏、對法。證謂三乘菩提分法。有能受持及正說者，教法住世。有能依教正修行者，佛正證法便住世間。道藉人弘，法依人住，人在法在，人亡法亡，故世親云：「故隨三人住世時量，應知世法住爾所時。」聖教總言唯住千載，有釋證法唯住千年，教法住時復過於此。

The commentary explains: The upper two lines answer the first question; the lower two lines answer the second question. The true Dharma is of two kinds: first, teaching; second, realization. The teaching refers to the sūtras, vinaya, and abhidharma. Realization refers to the factors of awakening of the three vehicles. As long as there are those who can uphold and correctly expound them, the Dharma of teaching abides in the world. As long as there are those who can correctly cultivate and practice in accordance with the teaching, the Buddha's true Dharma of realization abides in the world. The Way relies on people to propagate it; the Dharma depends on people to abide. When the people are present, the Dharma is present; when the people are gone, the Dharma is gone. Therefore Vasubandhu says: 'Therefore, corresponding to the duration of the abiding in the world of these three kinds of persons, one should know that the Dharma of the world abides for that long.' The noble teachings generally say that it abides for only a thousand years; some explain that the Dharma of realization abides for only a thousand years, while the duration of the abiding of the Dharma of teaching exceeds this.