Matsya Purana — Cosmic Architecture of Sun–Moon and the ‘Houses of the Gods’
दक्षिणे विश्वकर्मा तु रश्मिराप्याययद्बुधम् विश्वावसुश्च यः पश्चाच् छुक्रयोनिश्च स स्मृतः //
dakṣiṇe viśvakarmā tu raśmirāpyāyayadbudham viśvāvasuśca yaḥ paścāc chukrayoniśca sa smṛtaḥ //
In the southern quarter, the ray presided over by Viśvakarmā nourishes and strengthens Budha (Mercury). And the one that follows thereafter is remembered as Viśvāvasu; it is said to belong to the source-line (yoni) of Śukra (Venus).
This verse is not about Pralaya; it maps directional “rays” (raśmis) to deities and planets, describing how specific cosmic radiances are said to strengthen particular grahas like Budha (Mercury).
Indirectly, it supports dhārmic timing and orientation: kings and householders traditionally consult such direction–planet correspondences for auspicious planning (muhūrta) and for aligning actions with cosmic order (ṛta), even though no explicit royal/householder duty is stated here.
By identifying the southern quarter with Viśvakarmā and linking rays to planetary influences, the verse can be used in Vāstu- and ritual-orientation logic (dik-nirṇaya), where directions are correlated with presiding powers and auspicious effects.