अग्निनिचयः (Agninichaya) / The Accumulation of Sacred Fire & the Classification of Pitṛs by Time-Order
त्रेतायुगमुखे पूर्वमासन्स्वायंभुवेंऽतरे / देवायामा इति ख्याताः पूर्वं ये यज्ञसूनवः
tretāyugamukhe pūrvamāsansvāyaṃbhuveṃ'tare / devāyāmā iti khyātāḥ pūrvaṃ ye yajñasūnavaḥ
In former times, at the dawn of the Tretā Yuga, in the Svāyambhuva Manvantara, those who had earlier been the sons of Yajña were famed as the Devāyāmas.