Amāvasyā-Pitṛtarpaṇa: Purūravas and the Soma-Based Ancestral Offering (अमावस्या-पितृतर्पण / सोमतर्पण-विधि)
पीत्वार्द्धमासं गच्छन्ति चतुर्दश्यां सुधामृतम् / इत्येवं पीयमानैस्तु देवैः सर्वैर्निशाकरः
pītvārddhamāsaṃ gacchanti caturdaśyāṃ sudhāmṛtam / ityevaṃ pīyamānaistu devaiḥ sarvairniśākaraḥ
Having drunk the sudhā-amṛta on the fourteenth day (caturdaśī), they pass on through half the month; thus, as all the Devas drink, Niśākara—the Moon—wanes.