The Tipiṭaka in Three Languages

Pādukāvagga

Vinayapiṭaka · Parivāra · Vol. 8 · Section 237

[237] The offense of wrongdoing (dukkaṭa) for one who, out of disrespect, while walking behind, teaches the Dhamma to a person walking in front … There is one rule (paññatti) and one supplementary rule (anupaññatti). Of the six origins of offenses (āpattisamuṭṭhāna), it arises through one origin: it arises from body, from speech, and from mind (citta).

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places