Sekhiyakaṇḍa

Vinayapiṭaka · Parivāra · Vol. 8 · Section 428

[428] Out of disrespect (anādariyaṃ), while eating, one inserts the whole hand into the mouth: one 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English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.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