Mahāvaggavagga › Sabbamatthītikathā

Abhidhammapiṭaka · Kathāvatthu · Vol. 37 · Section 309

[309] [Sakavādin:] Does future form (rūpa) exist? [Paravādin:] Yes. [Sakavādin:] Is it not so that future form is not born, not become, not come into being, not produced, not brought forth, not manifested? [Paravādin:] Yes. [Sakavādin:] If future form is not born … not manifested, then indeed, good sir, you should not say that future form exists.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 1 other place

Vol. 37 · Section 332 — Sabbamatthītikathā