Amāvasyā-Pitṛtarpaṇa: Purūravas and the Soma-Based Ancestral Offering (अमावस्या-पितृतर्पण / सोमतर्पण-विधि)
पूर्णन्दोः पूर्णपक्षे तु रात्रिसंधिश्च पूर्णिमा / ततो विरज्यते नक्तं पौर्णमास्यां निशाकरः
pūrṇandoḥ pūrṇapakṣe tu rātrisaṃdhiśca pūrṇimā / tato virajyate naktaṃ paurṇamāsyāṃ niśākaraḥ
In the bright fortnight, the very junction of the night is called Pūrṇimā; on that Paurṇamāsī night, Niśākara—the Moon—shines with special splendor.