Amāvasyā-Pitṛtarpaṇa: Purūravas and the Soma-Based Ancestral Offering (अमावस्या-पितृतर्पण / सोमतर्पण-विधि)
तं कालं सूर्यनिर्द्देश्यं दृष्ट्वा संख्यां तु सर्पति / स वै वषटाक्रियाकालः सद्यः कालं विधीयते
taṃ kālaṃ sūryanirddeśyaṃ dṛṣṭvā saṃkhyāṃ tu sarpati / sa vai vaṣaṭākriyākālaḥ sadyaḥ kālaṃ vidhīyate
Beholding that moment as indicated by the Sun, the reckoning moves onward. That indeed is the time for the vaṣaṭ rite; at once, according to rule, the time is duly fixed.