The Tipiṭaka in Three Languages

Sekhiyakaṇḍa

Vinayapiṭaka · Parivāra · Vol. 8 · Section 457

[457] Out of disrespect (anādariyaṃ paṭicca), one walking behind who teaches the Dhamma to a person walking in front commits one offense (āpatti): a dukkaṭa.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places