Matsya Purana — Yayāti’s Rule
परिचिन्त्य स कालज्ञः कलाकाष्ठाश्च वीर्यवान् पूर्णम् मत्वा ततः कालं पूरुं पुत्रमुवाच ह //
paricintya sa kālajñaḥ kalākāṣṭhāśca vīryavān pūrṇam matvā tataḥ kālaṃ pūruṃ putramuvāca ha //
Having reflected, that mighty one—skilled in discerning the proper time, even down to minutes and moments—judged the time to be fulfilled; then he spoke to his son Pūru.
This verse does not discuss pralaya; it highlights kāla-vicāra (discernment of the right time) in a royal narrative context.
It presents an ideal of rulership: a leader should deliberate carefully and act at the proper time, indicating prudence before addressing succession or major decisions.
No direct vastu or temple-ritual rule is stated; the technical note is temporal precision (kalā, kāṣṭhā), which broadly aligns with Purāṇic emphasis on correct timing for rites and state actions.