While undertaking investigation for acceptable food, to accept only the pure food which is free from the blemishes of Udgama, Utpādana and Eṣaṇā.
evaṃ tu gaviṭṭhassa uggamauppayaṇāvisuddhassa.
gahaṇavisohivisuddhassa hoi gahaṇaṃ tu piṃḍassa...
(PiNi 513)
grahaṇaiṣaṇāyāṃ śodhayecchankitādidosatyagataḥ...
(UśāVṛ Pa 517)