Theravāda Vinaya
Mahāvibhaṅga
Sekhiyakaṇḍa
Khambhakatavagga
Sekhiyā 23: Oguṇṭhitasikkhāpada
Tena samayena buddho bhagavā sāvatthiyaṃ viharati jetavane anāthapiṇḍikassa ārāme. Tena kho pana samayena chabbaggiyā bhikkhū sasīsaṃ pārupitvā antaraghare gacchanti … pe ….
“Na oguṇṭhito antaraghare gamissāmīti sikkhā karaṇīyā”ti. (23:168)
Na oguṇṭhitena antaraghare gantabbaṃ. Yo anādariyaṃ paṭicca sasīsaṃ pārupitvā antaraghare gacchati, āpatti dukkaṭassa.