The Tipiṭaka in Three Languages

Sekhiyakaṇḍa

Vinayapiṭaka · Parivāra · Vol. 8 · Section 455

[455] Out of disrespect (anādariya), having sat down on a low seat, one teaching the Dhamma to a person seated on a high seat commits one offence (āpatti): a dukkaṭa.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places