โปกขรณีสูตร

Seyyathāpi bhikkhave pokkharaṇī paññāsa yojanāni āyāmena paññāsa yojanāni vitthārena paññāsa yojanāni ubbedhena puṇṇā udakassa samatittikā kākapeyyā tato puriso Kusaggena udakaṃ uddhareyya . taṃ kiṃ maññatha bhikkhave katamaṃ nu kho bahutaraṃ . yaṃ vā kusaggena ubbhataṃ yaṃ vā pokkharaṇiyā udakanti . etadeva bhante bahutaraṃ yadidaṃ pokkharaṇiyā udakaṃ appamattakaṃ kusaggena udakaṃ ubbhataṃ saṅkhampi na upeti upanidhampi na upeti kalabhāgampi na upeti pokkharaṇiyā udakaṃ upanidhāya kusaggena udakaṃ ubbhatanti . evameva 1- kho bhikkhave ariyasāvakassa .pe. Yogo karaṇīyoti.