Matsya Purana — The Ravi-Śayana
आदित्यशयनं नाम यथावच्छंकरार्चनम् येषु नक्षत्रयोगेषु पुराणज्ञाः प्रचक्षते //
ādityaśayanaṃ nāma yathāvacchaṃkarārcanam yeṣu nakṣatrayogeṣu purāṇajñāḥ pracakṣate //
The rite called “Āditya-śayana,” and likewise the proper worship of Śaṅkara—so the knowers of the Purāṇas declare—are to be performed in those specific combinations of lunar mansions and yogas (nakṣatra-yogas).
This verse is not about pralaya; it focuses on ritual timing—stating that certain observances (Āditya-śayana and Śaṅkara worship) are to be done under specific nakṣatra–yoga combinations as taught by Puranic authorities.
It frames dharmic duty as disciplined observance: a king or householder should perform vows and deity-worship “yathāvat” (according to rule), including choosing proper astrological timings (nakṣatra-yogas) as part of orthodox practice.
The significance is ritual (not architectural): it emphasizes correct procedure and auspicious timing—linking specific vratas and Śiva-arcana to prescribed nakṣatra–yoga configurations, i.e., muhurta-based performance.