俱舍論頌疏論本 20.23

20.23

釋曰：前三句經部破，第四句有宗答。何礙用云何者，此用字兩度言之，一何礙用、二用云何。何礙用者，經部破云：汝說三世法體常有，應一切時能起作用，何法礙用，時有時無？用云何者，汝說法體由作用故三世有別，又此作用，云何得說為去來今？且作用中而得更立有餘作用，用上有用，便致無窮。

The explanation says: The first three lines are the Sautrāntika refutation; the fourth line is the Sarvāstivāda response. As for "What obstructs function? How is there function?": the word "function" is spoken twice: first, "what obstructs function?"; second, "how is there function?" As for "what obstructs function?": the Sautrāntika refutes them, saying: You state that the entities of dharmas in the three time-periods are permanently existent; then at all times they should be able to produce function; what dharma obstructs function so that it sometimes exists and sometimes does not? As for "how is there function?": you state that because of function, the entities of dharmas are distinguished into three time-periods; moreover, regarding this function, how can it be spoken of as past, future, and present? And within function, can yet another function be further posited? A function upon a function would then lead to an infinite regress.