श्राद्धकल्पे पितृदेवपूजाक्रमः (Śrāddhakalpa: Order of Pitṛ and Deva Worship)
सोममाप्याययन्त्येते पितरो योगसंस्थिताः / तस्माद्दद्याच्छुचिः पिण्डान्योगेभ्यस्तत्परायणः
somamāpyāyayantyete pitaro yogasaṃsthitāḥ / tasmāddadyācchuciḥ piṇḍānyogebhyastatparāyaṇaḥ
These Pitara, established in yoga, cause Soma to flourish. Therefore, being pure and devoted to yoga, one should offer the piṇḍas.