Khuddakavatthukkhandhaka

Vinayapiṭaka · Cūḷavagga (2) · Vol. 7 · Section 80

[80] Now at that time bhikkhus were walking in meditation on an uneven walking path (caṅkama). Their feet became painful. They reported this matter to the Blessed One. "Bhikkhus, I allow you to make it level."

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.