Ekādasakamātikā

Abhidhammapiṭaka · Dhammasaṅgaṇī · Vol. 34 · Section 534

[534] Which is that form (rūpa) that is the growth of form (rūpassa upacayo)? That which is the accumulation (ācaya) of the sense bases (āyatana) — that is the growth of form. This is that form that is the growth of form.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 1 other place

Vol. 34 · Section 583 — Ekādasakamātikā