The Tipiṭaka in Three Languages

Hetudukamicchattattika

Abhidhammapiṭaka · Paṭṭhāna (5) · Vol. 44 · Section 701

[701] A phenomenon (dhamma) that is a root (hetu) and unfixed (aniyata) is a condition for a phenomenon that is a root and unfixed, by object condition (ārammaṇa-paccaya): nine.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places