Vinaykathā

Vinayapiṭaka · Cūḷavagga (2) · Vol. 7 · Section 315

[315] Now on that occasion a coiled pad (cakkalī) had accrued to the Saṅgha. They reported this matter to the Blessed One. "Bhikkhus, I allow it to be made into a foot-wiper (pādapuñchanī)."

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 1 other place