Amāvasyā-Pitṛtarpaṇa: Purūravas and the Soma-Based Ancestral Offering (अमावस्या-पितृतर्पण / सोमतर्पण-विधि)
एतासां द्विलवः कालः कुहूमात्रङ्कुहूःस्मृताः / चन्द्रसूर्यव्यतीपाते संगते पूर्णिमान्तरे
etāsāṃ dvilavaḥ kālaḥ kuhūmātraṅkuhūḥsmṛtāḥ / candrasūryavyatīpāte saṃgate pūrṇimāntare
The span of two lavas of these is remembered as the ‘measure of Kuhū’; and when, in the vyatīpāta—Moon and Sun in special conjunction—it occurs within the interval between full moons, that is called Kuhū.