Matsya Purana — Cosmography of Śākadvīpa and Successive Dvīpas: Mountains
तासां सहस्रशश्चान्या नद्यः पार्श्वसमीपगाः अभिगच्छन्ति ता नद्यो बहुलाश्च बहूदकाः //
tāsāṃ sahasraśaścānyā nadyaḥ pārśvasamīpagāḥ abhigacchanti tā nadyo bahulāśca bahūdakāḥ //
And in their thousands, other rivers—running close alongside—flow into those rivers; they are many in number and rich in waters.
This verse does not describe Pralaya directly; it highlights the Purana’s sacred-geographical vision of a vast river system where countless tributaries join larger rivers, emphasizing abundance and interconnected flow.
By stressing many water-rich rivers and tributaries, the verse supports a dharmic ideal of stewardship: kings protect waterways and ensure irrigation and access, while householders honor rivers as life-supporting and ritually purifying resources.
Ritually, confluences and water-rich rivers are prime locations for tirtha practices—bathing, offerings, and ancestor rites; architecturally, such verses guide temple and ghat placement near stable, abundant water sources.