Matsya Purana — Dhruva as Cosmic Pivot: Motions of Sun–Moon–Planets
इभास्ये च ततः पश्चाद् इदं भूतविवृद्धये वर्षद्वयं समाख्यातं सम्यग्वृष्टिविवृद्धये //
ibhāsye ca tataḥ paścād idaṃ bhūtavivṛddhaye varṣadvayaṃ samākhyātaṃ samyagvṛṣṭivivṛddhaye //
And thereafter, in the (type called) ‘Elephant-faced’, this two-year period is prescribed for the increase of living beings—indeed, for the proper increase of rainfall.
It does not directly discuss Pralaya; it focuses on ritual/iconographic prescriptions intended to sustain life by promoting prosperity and rainfall.
It frames ritual correctness as a public good: rulers and householders support social welfare by performing or sponsoring rites that are believed to ensure timely rains and the flourishing of beings.
It assigns an auspicious time-span (‘two years’) connected with an ‘elephant-faced’ type/form, indicating that iconographic/ritual classifications are tied to desired results—here, growth of beings and increased rainfall.