Sekhiyakaṇḍa

Vinayapiṭaka · Parivāra · Vol. 8 · Section 433

[433] Out of disrespect (anādariya), one eating while shaking the hand commits one offence: an offence of wrongdoing (dukkaṭa).

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places