Ṛgvidhāna · Chapter 1.8

tapta.kṛcchram.caran.vipro.jala.kṣīra.ghṛta.anilān./
pratitryaham.pibed.uṣṇānt.sakṛtsnāyī.saṃhāhitaḥ.//

niyatas.tu.pibed.apaḥ.prājāpatya.vidhiḥ.smṛtaḥ./
yati.kṛcchram.vadanty.etad.rapasām.apanodanam.//

yata.ātmano.apramattasya.dvādaśa.aham.abhojanam./
parāko.nāma.kṛcchro.ayam.sarva.pāpa.apanodanaḥ.//

eka.ekam.hrāsayet.piṇḍam.kṛṣṇe.śukle.ca.vardhayet./
upaspṛśaṃs.triṣavaṇam.etac.cāndrāyaṇam.vratam.//

etam.eva.vidhim.kṛtsnam.ācared.yava.madhyame./
śukla.pakṣa.ādi.niyataḥ.caraṃś.cāndrāyaṇa.vratam.//