The Tipiṭaka in Three Languages

Hetudukaajjhattattika

Abhidhammapiṭaka · Paṭṭhāna (5) · Vol. 44 · Section 820

[820] A phenomenon (dhamma) that is a root (hetu) and internal (ajjhatta) is a condition for a phenomenon that is a root and internal 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English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.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