Matsya Purana — Measures of Time: Caturyuga Computation
सत्येन ब्रह्मचर्येण श्रुतेन तपसा तथा तेषां सुतप्ततपसाम् आर्षेणानुक्रमेण ह //
satyena brahmacaryeṇa śrutena tapasā tathā teṣāṃ sutaptatapasām ārṣeṇānukrameṇa ha //
By truthfulness, by the discipline of brahmacarya, by sacred learning (śruti), and likewise by austerity—thus, for those sages who have performed intense penance, their succession is preserved according to the ṛṣi-lineage and its proper order.
This verse is not about pralaya; it emphasizes the sustaining power of dharma—truth, brahmacarya, Vedic learning, and tapas—by which the rishi tradition and its ordered succession endure across ages.
It frames the king’s and householder’s support of dharma: protect truthfulness in society, honor brahmacarya and disciplined conduct, patronize Vedic study, and respect ascetics—thereby safeguarding the continuity of sacred lineages and teaching traditions.
No direct Vāstu or iconographic rule appears here; the ritual takeaway is that śruti-study and tapas are foundational qualifications for ṛṣis, which underpins the authority behind later ritual and temple prescriptions.