Matsya Purana — Genealogy and Classification of Sacred Fires
अथ यः पवमानस्तु निर्मथ्यो ऽग्निः स उच्यते स च वै गार्हपत्यो ऽग्निः प्रथमो ब्रह्मणः स्मृतः //
atha yaḥ pavamānastu nirmathyo 'gniḥ sa ucyate sa ca vai gārhapatyo 'gniḥ prathamo brahmaṇaḥ smṛtaḥ //
Now, the fire called Pavamāna is the fire produced by churning (the fire-drill). Indeed, that very fire is the Gārhapatya, the householder’s sacred fire, remembered as the first among Brahmā’s fires.
It does not describe Pralaya; it explains ritual cosmology by tracing the origin-status of the Gārhapatya fire (as Pavamāna, born from churning) and linking it to Brahmā’s primordial order.
It supports gṛhastha-dharma: the Gārhapatya is the foundational household fire, traditionally kindled by churning and maintained as the primary domestic-sacrificial fire, from which other rites and fires are derived.
Ritually, it identifies the correct origin and name of the Gārhapatya fire—Pavamāna, produced by churning—establishing proper procedure and authority for household sacrificial practice.