MahāvaggavaggaParihānikathā

Abhidhammapiṭaka · Kathāvatthu · Vol. 37 · Section 214

[214] Sakavādī: The Arahant (arahā) has seen suffering (dukkha) — does the Arahant fall away from Arahantship (arahatta)? Paravādī: Yes. Sakavādī: The Once-Returner (sakadāgāmī) has seen suffering — does the Once-Returner fall away from the fruition of Once-Returning (sakadāgāmi-phala)? Paravādī: It should not be said thus. … Sakavādī: The Arahant has seen the origin (samudaya) … has seen cessation (nirodha) … has seen the path (magga) … has seen the four truths (cattāri saccāni) — does the Arahant fall away from Arahantship? Paravādī: Yes. Sakavādī: The Once-Returner has seen the four truths — does the Once-Returner fall away from the fruition of Once-Returning? Paravādī: It should not be said thus. …

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places