अशक्तस्तु त्रयोदश्यां नक्तं कुर्याज्जितेन्द्रियः । अयाचितं चतुर्दश्यां ह्युपवासेन पूर्णिमाम्
aśaktastu trayodaśyāṃ naktaṃ kuryājjitendriyaḥ | ayācitaṃ caturdaśyāṃ hyupavāsena pūrṇimām
Mas, se alguém não puder jejuar plenamente no décimo terceiro dia, dominando os sentidos pode observar o nakta (refeição apenas à noite). No décimo quarto, deve-se tomar somente alimento não solicitado (ayācita), e no dia de lua cheia observar jejum.
Śiva
Tirtha: Prabhāsa-kṣetra
Type: kshetra
Listener: Implied same addressed woman; general instruction to devotees
Scene: A self-controlled pilgrim in Prabhāsa: trayodaśī night-meal in simplicity, caturdaśī receiving unsolicited alms, culminating in pūrṇimā fast before the temple/sea.
Purāṇic dharma includes compassionate gradations—when full austerity is not possible, controlled alternatives preserve the vow’s spirit.
The observance is situated in the Prabhāsa-kṣetra teaching cycle of the Skanda Purāṇa.
If unable to fast fully: trayodaśī—nakta; caturdaśī—ayācita; pūrṇimā—upavāsa.