The Tipiṭaka in Three Languages

Hetudukaajjhattattika

Abhidhammapiṭaka · Paṭṭhāna (5) · Vol. 44 · Section 828

[828] Dependent on an external (bahiddhā) phenomenon (dhamma) that is a root (hetu), an external phenomenon that is a root arises — by root condition (hetu-paccaya).

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places