Matsya Purana — Tārakāsura’s Austerity and Boon; Mobilization for War; Bṛhaspati’s Fourfold P...
साधु साध्वित्यवोचंस्ते तत्र दैत्याः सविस्मयाः सो ऽगच्छत्पारियात्रस्य गिरेः कन्दरमुत्तमम् //
sādhu sādhvityavocaṃste tatra daityāḥ savismayāḥ so 'gacchatpāriyātrasya gireḥ kandaramuttamam //
There, the Daityas, struck with amazement, exclaimed, “Well done! Well done!” Then he went to the finest cave of Mount Pāriyātra.
Nothing directly about Pralaya is stated here; the verse is narrative, describing Daityas reacting in amazement and a subsequent journey to a cave on Mount Pāriyātra.
Indirectly, it supports the Matsya Purana’s broader ethic of honoring merit and undertaking purposeful journeys; the explicit content here is not a rule of kingship or household dharma.
The key term is kandara (cave), a sacred landscape feature often associated with tapas and pilgrimage; no specific Vastu or temple-building rule is stated in this verse.