Amāvasyā-Pitṛtarpaṇa: Purūravas and the Soma-Based Ancestral Offering (अमावस्या-पितृतर्पण / सोमतर्पण-विधि)
व्यतीपाते स्थिते सूर्ये लेखार्द्धे तु युगान्तरे / युगान्तरोदिते चैव लेशार्द्धे शशिनः क्रमात्
vyatīpāte sthite sūrye lekhārddhe tu yugāntare / yugāntarodite caiva leśārddhe śaśinaḥ kramāt
In vyatīpāta, when the Sun stands at the ‘half‑line’ (lekhārdha), the yuga‑interval is spoken of; and when that interval arises, in due order the Moon too is at the ‘half‑portion’ (leśārdha).