俱舍論記 19.205

19.205

「今依契經至問記有四」者，此下第三依經辨釋。今依契經辨問記相。於大眾部經，問記有四。

On the passage from "Now, relying on the sūtras" to "there are four questions and answers": below this is the third part, distinguishing and explaining according to the sūtras. Now, relying on the sūtras, the characteristics of question and answer are distinguished. In the sūtras of the Mahāsāṃghika, there are four questions and answers.