[1680] S. Is there form (rūpa) that belongs to the formless sphere (arūpāvacara)?
P. Yes.
S. Is it attainment-seeking (samāpattesiya), rebirth-seeking (upapattesiya), a pleasant abiding in this very life (diṭṭhadhammasukhavihāra); accompanied by, co-arisen with, mingled with, and associated with the attainment-seeking mind (citta), with the rebirth-seeking mind, with the mind that is a pleasant abiding in this very life; of one arising, of one cessation, of one basis (vatthu), of one object (ārammaṇa) with it?
P. It should not be said so. …
S. Is it not the case that it is not attainment-seeking, not rebirth-seeking, not a pleasant abiding in this very life; that it is not, with the attainment-seeking mind, … of one object?
P. Yes.
S. If it is not attainment-seeking, not rebirth-seeking, … of one basis, of one object — then indeed, sir, you should not say: "There is form that belongs to the formless sphere."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.