Matsya Purana — The Syamantaka Jewel Episode and the Vrishni–Sainya Genealogies
हृदि कृत्वा तु बहुशो मणिं तमभियाचितः गोविन्दो ऽपि न तं लेभे शक्तो ऽपि न जहार सः //
hṛdi kṛtvā tu bahuśo maṇiṃ tamabhiyācitaḥ govindo 'pi na taṃ lebhe śakto 'pi na jahāra saḥ //
Though repeatedly entreated for that jewel, he kept it close to his heart; even Govinda could not obtain it, and though fully capable, he did not take it away by force.
This verse is not about Pralaya; it emphasizes dharmic restraint—power exists, yet force is not used—highlighting moral order rather than cosmic dissolution.
It supports the dharma principle that even when one has the power to seize, one should avoid coercion; for kings it implies just governance without oppression, and for householders it teaches self-control over possessions and desires.
No direct Vastu or ritual procedure is stated; the key takeaway is ethical—restraint and non-appropriation—often treated as a prerequisite virtue for any ritual or religious undertaking.