The Tipiṭaka in Three Languages

Arūpāvacaradukkusalattika

Abhidhammapiṭaka · Paṭṭhāna (5) · Vol. 44 · Section 1750

[1750] A wholesome phenomenon (dhamma) belonging to the formless sphere (arūpāvacara) is a condition (paccaya) for a wholesome phenomenon belonging to the formless sphere 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English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.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