अग्निनिचयः (Agninichaya) / The Accumulation of Sacred Fire & the Classification of Pitṛs by Time-Order
अग्निष्वात्ता स्मृतास्ते वै पितरो नाहिताग्नयः / यज्वानस्तेषु ये त्वासन्पितरः सोमपीथिनः
agniṣvāttā smṛtāste vai pitaro nāhitāgnayaḥ / yajvānasteṣu ye tvāsanpitaraḥ somapīthinaḥ
The Pitara known as Agniṣvātta are those who had not established the sacred fires; but among them, those who were yajvān are the Pitara who drink Soma.