TIPITAKA Volume 16 : PALI ROMAN Sutta Pitaka Vol 8 : Sutta. Saṃ. Ni.

[313] Sāvatthiyaṃ viharati ... Tatra kho bhagavā ... Seyyathāpi bhikkhave pokkharaṇī paññāsayojanā 3- āyāmena paññāsayojanā vitthārena @Footnote: 1 Ma. vāyaṃ . 2 Ma. Yu. vā . 3 Ma. Yu. paññāsayojanāni. evamuparipi. Paññāsayojanā ubbedhena puṇṇā udakassa samatittikā kākapeyyā tato puriso kusaggena udakaṃ uddhareyya . taṃ kiṃ maññatha bhikkhave katamaṃ nu kho bahutaraṃ yaṃ vā kusaggena udakaṃ ubbhataṃ yaṃ vā pokkharaṇiyā udakanti . etadeva bhante bahutaraṃ yadidaṃ pokkharaṇiyā udakaṃ appamattakaṃ kusaggena udakaṃ ubbhataṃ neva satimaṃ kalaṃ upeti na sahassimaṃ kalaṃ upeti na satasahassimaṃ kalaṃ upeti pokkharaṇiyā udakaṃ upanidhāya kusaggena udakaṃ ubbhatanti.