Matsya Purana — Origin of Soma
धृतिस् त्यक्त्वा पीतं नन्दिं सोममेवाभजंस्तदा स्वकीया इव सोमो ऽपि कामयामास तास्तदा //
dhṛtis tyaktvā pītaṃ nandiṃ somamevābhajaṃstadā svakīyā iva somo 'pi kāmayāmāsa tāstadā //
Casting off restraint, they then turned to Soma alone, having drunk the exhilarating sacred draught; and Soma too, as though they were his own, desired those women at that time.
This verse does not address Pralaya; it belongs to a mythic-genealogical narrative centered on Soma and the dynamics of desire and restraint.
By highlighting the abandonment of dhṛti (restraint) and the arising of kāma (desire), it functions as an ethical warning: self-control is foundational for householders and rulers, whose lapses can lead to disorder and transgression.
No Vāstu or temple-architecture rule is stated here; the only ritual-adjacent term is “Soma,” which can imply a sacred drink, but the verse primarily emphasizes desire rather than procedure.