Matsya Purana — Uma’s Austerities and the Slaying of the Deceiver Asura ĀḌi
इत्युक्तः शंकरः शङ्कां कांचित्प्राप्यावधारयत् हृदयेन समाधाय देवः प्रहसिताननः //
ityuktaḥ śaṃkaraḥ śaṅkāṃ kāṃcitprāpyāvadhārayat hṛdayena samādhāya devaḥ prahasitānanaḥ //
Thus addressed, Śaṅkara (Śiva), entertaining a certain doubt, reflected inwardly; composing his mind within his heart, the god—his face lit by a gentle smile—resolved what was to be done.
This verse does not describe pralaya or cosmology directly; it highlights a deity’s inward reflection and resolve, a narrative pause often used before a consequential divine action.
It models dhārmic decision-making: when doubt arises, one should become inwardly collected (samādhāya) and then determine the proper course with clarity rather than haste.
No explicit Vāstu/ritual rule appears in this verse; its closest ritual implication is the ideal of mental composure (inner samādhi) preceding sacred or decisive acts.