Matsya Purana — Genealogy and Classification of Sacred Fires
ततो विहरणीयांस्तु वक्ष्याम्यष्टौ तु तान्सुतान् हौत्रियस्य सुतो ह्यग्निर् बर्हिषो हव्यवाहनः //
tato viharaṇīyāṃstu vakṣyāmyaṣṭau tu tānsutān hautriyasya suto hyagnir barhiṣo havyavāhanaḥ //
Thereafter I shall describe those eight noteworthy sons. Agni is the son of Hautriya, and Havyavāhana is the son of Barhiṣ.
This verse does not describe Pralaya; it shifts into a genealogical catalog, naming notable sons and identifying Agni/Havyavāhana through parentage.
Indirectly, it supports the Purāṇic aim of preserving lineage-memory; for householders, Agni/Havyavāhana evokes the centrality of sacred fire in domestic and śrauta rites (homa, offerings), which are key dharmic duties.
Ritually, “Havyavāhana” highlights Agni as the ‘carrier of oblations’—the indispensable mediator in yajña and homa; no Vāstu/temple-building rule is stated in this specific verse.