Pañhāvāra

Abhidhammapiṭaka · Paṭṭhāna (1) · Vol. 40 · Section 603

[603] An indeterminate (abyākata) phenomenon (dhamma) is a condition for an indeterminate phenomenon by association condition (sampayutta-paccaya). One aggregate (khandha) that is resultant (vipāka) indeterminate or functional (kiriyā) indeterminate is a condition for three aggregates by association condition; three aggregates are a condition for one aggregate by association condition; two aggregates are a condition for two aggregates by association condition. At the moment of rebirth-linking (paṭisandhi), one aggregate that is resultant indeterminate is a condition for three aggregates by association condition; three aggregates are a condition for one aggregate by association condition; two aggregates are a condition for two aggregates by association condition.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places