Vinaykathā

Vinayapiṭaka · Cūḷavagga (2) · Vol. 7 · Section 318

[318] Now at that time bhikkhus stepped upon a lodging (senāsana) with wet feet. The lodging became soiled. They informed the Blessed One of this matter. "Bhikkhus, a lodging should not be stepped upon with wet feet; whoever should step upon it commits an offense of wrongdoing (dukkaṭa)."

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 3 other places