सप्तद्वीप-समुद्र-प्रमाणम्: प्लक्षादि-द्वीपवर्णनं, लोकालोक-सीमा, चन्द्र-समुद्र-वृद्धिक्षयः
एवं द्वीपाः समुद्रैस् तु सप्त सप्तभिर् आवृताः द्वीपश् चैव समुद्रश् च समानौ द्विगुणौ परौ
evaṃ dvīpāḥ samudrais tu sapta saptabhir āvṛtāḥ dvīpaś caiva samudraś ca samānau dviguṇau parau
இவ்வாறு ஏழு தீவுகள் ஏழு கடல்களால் சூழப்பட்டுள்ளன. ஒவ்வொரு தீவும் அதனை ஒட்டிய கடலும் அளவில் சமம்; ஆனால் அடுத்தடுத்த ஜோடிகள் முன்பதைக் காட்டிலும் இரட்டிப்பு.
Sage Parāśara (teaching Maitreya)
They present a concentric model of sacred geography where the world is ordered in paired rings—continent and ocean—expressing a patterned cosmic design governed by dharma and ultimately upheld by Vishnu.
Parāśara states that each dvīpa and its adjoining ocean match each other in measure, while the next outer pair is twice the size of the preceding one—an orderly scaling that structures the cosmos in expanding tiers.
Even when Vishnu is not named in the verse, the Purāṇic cosmology functions as a depiction of a universe sustained by a supreme, intelligent order—classically understood in the Vishnu Purana as resting upon Vishnu’s sovereign reality.