The Tipiṭaka in Three Languages

Ekādasakamātikā

Abhidhammapiṭaka · Dhammasaṅgaṇī · Vol. 34 · Section 581

[581] Which form (rūpa) is malleability of form (rūpassa mudutā)? That which is malleability of form — the pliability (maddavatā), non-hardness (akakkhaḷatā), non-rigidity (akathinatā) of form — this form is malleability of form. Which form is not malleability of form? The eye sense base (cakkhāyatana) … edible nutriment (kabaḷīkāra āhāra) — this form is not malleability of form.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 4 other places