MahāvaggavaggaSabbamatthītikathā

Abhidhammapiṭaka · Kathāvatthu · Vol. 37 · Section 341

[341] Sakavādin: Past consciousness (viññāṇa) exists; past consciousness does not abandon its state of being past (atītabhāva)? Paravādin: Yes. Sakavādin: Is past consciousness permanent, stable, eternal, not subject to change? Paravādin: It should not be said so. … Sakavādin: Is not past consciousness impermanent, unstable, non-eternal, subject to change? Paravādin: Yes. Sakavādin: If past consciousness is impermanent, unstable, non-eternal, subject to change, then indeed it should not be said, "Past consciousness exists; past consciousness does not abandon its state of being past."

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places