Matsya Purana — Genealogy and Classification of Sacred Fires
परस्परोत्थितो ह्यग्निर् भूतानीह विभुर्दहन् अग्नेर्मन्युमतः पुत्रो घोरः संवर्तकः स्मृतः //
parasparotthito hyagnir bhūtānīha vibhurdahan agnermanyumataḥ putro ghoraḥ saṃvartakaḥ smṛtaḥ //
From mutual friction and interaction arises the all-pervading fire, which here burns living beings; it is remembered as the dreadful Saṃvartaka, the son of Agni, born of his wrath.
It identifies the Saṃvartaka as a catastrophic, all-consuming fire associated with pralaya, portrayed as arising from intense interaction/friction and empowered by Agni’s wrath to burn all beings.
Indirectly, it underscores impermanence: kings and householders should govern and live with dharma and detachment, recognizing that worldly prosperity can be consumed in cosmic dissolution.
No direct Vāstu or temple rule is stated; ritually, it supports the pralaya theme that motivates protective rites, fire-propitiation, and purificatory observances acknowledging Agni’s supreme consuming power.