俱舍論頌疏論本 13.28

13.28

Second, as for the proof from untainted forms: as a sūtra states, "What are untainted phenomena? Namely, when neither craving nor anger arises toward any forms of the past, future, or present, and so forth up to consciousness as well; these are called untainted phenomena." Since this sūtra speaks of untainted forms, one clearly knows that the substance of avijñapti must be real. Aside from avijñapti, there are no other forms that are called untainted.