The Tipiṭaka in Three Languages

Upādādukkusalattika

Abhidhammapiṭaka · Paṭṭhāna (5) · Vol. 44 · Section 1535

[1535] A not-derived (no-upādā) indeterminate (abyākata) phenomenon (dhamma) is a condition for a not-derived indeterminate phenomenon by root condition (hetu-paccaya): three.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places