Naniyataduka

Abhidhammapiṭaka · Paṭṭhāna (4) · Vol. 43 · Section 841

[841] A fixed phenomenon (niyata dhamma) is a condition for a fixed phenomenon by root condition (hetu-paccaya): The four (cases) are similar to the emancipating dyad (niyyānika-duka), without any difference.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.