The Law Code of Yājñavalkya 1.7.29

1.7.29

tathā, vaṭaplakṣāśvatthakapitthanīpamātuliṅgaphalāni varjayet iti smaraṇāt | etān saṃdhinīkṣīraprabhṛtīn anukrāntān kāmato bhakṣayitvā trirātram upavaset | akāmatas tv ahorātram | śeṣeṣupavased ahaḥ (MDh 5.20) iti manusraraṇāt | yat punaḥ śaṅkhenoktam balabalākāhaṃsaplavacakravākakāraṇḍavagṛhacaṭakakapotapārāvatapāṇḍuśukasārikāsārasa-ṭiṭṭibholūkakaṅkaraktapādacāṣabhāsavāyasakokilaśāḍvalikukkuṭahārītabhakṣaṇe dvādaśarātram anāhāraḥ pibed gomūtrayāvakam iti, tad bahukālābhyāse matipūrve samastabhakṣaṇe vā veditavyam || 1.175 ||

Likewise, because of the traditional text: "One should avoid the fruits of the banyan, plakṣa, aśvattha, kapittha, nīpa, and citron." Having intentionally consumed these aforementioned items beginning with the milk of a cow in heat, one should fast for three nights. But if done unintentionally, for a day and a night, because of the traditional text of Manu: "For the rest, one should fast for a day" (MDh 5.20). Furthermore, as for what is stated by Śaṅkha: "Upon consuming a crane, a heron, a swan, a plava duck, a cakravāka, a kāraṇḍava duck, a house sparrow, a dove, a pigeon, a pale parrot, a maina, a sarus crane, a lapwing, an owl, a heron, a red-legged bird, a blue jay, a bhāsa bird, a crow, a cuckoo, an emerald dove, a fowl, or a green pigeon, one should drink barley gruel boiled with cow's urine for twelve nights without food," that is to be understood as applying to prolonged habituation, to an intentional act, or to consuming them all together. || 1.175