Khuddakavatthukkhandhaka

Vinayapiṭaka · Cūḷavagga (2) · Vol. 7 · Section 101

[101] Now at that time a certain lay follower (upāsaka) wished to have a pond built for the benefit of the Saṅgha. They reported this matter to the Blessed One. "Bhikkhus, I allow a pond." The bank of the pond crumbled … "Bhikkhus, I allow you to build up three kinds of facing: a facing of brick, a facing of stone, and a facing of wood." Those climbing up were troubled. "Bhikkhus, I allow three kinds of stairs: brick stairs, stone stairs, and wooden stairs." Those climbing up fell off … "Bhikkhus, I allow a railing to hold on to." The water in the pond became stale … "Bhikkhus, I allow a water channel and a water drain."

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.