Srimad Bhagavatam — Dvadasha Skandha, Shloka 1
Brahmā’s Day, the Four Pralayas, and the Supreme Shelter Beyond Cause–Effect
श्रीशुक उवाच कालस्ते परमाण्वादिर्द्विपरार्धावधिर्नृप । कथितो युगमानं च शृणु कल्पलयावपि ॥ १ ॥
śrī-śuka uvāca kālas te paramāṇv-ādir dvi-parārdhāvadhir nṛpa kathito yuga-mānaṁ ca śṛṇu kalpa-layāv api
シュカデーヴァは言った。王よ、私はすでに、ひとつの原子の動きで測られる最微の時から、ブラフマーの全寿命（ドヴィパラールダ）に至るまでの時間の尺度を語り、また諸ユガの長さも述べた。いまは、ブラフマーの一日（カルパ）の時量と、プララヤ（壊滅）の過程を聞きなさい。
FAQs
This verse states that Śukadeva explains time from the tiniest unit (paramāṇu) up to immense spans (two parārdhas), and then proceeds to describe kalpa (creation cycles) and pralaya (dissolutions).
In Canto 12, Śukadeva systematically teaches Parīkṣit Vedic cosmology—time, yugas, and then the larger cycles of creation and dissolution—so the king can understand the world’s impermanence and fix his mind on the eternal Lord.
Reflecting on vast cosmic time and dissolution helps reduce anxiety and attachment, encouraging steady devotion (bhakti) and prioritizing spiritual practice over temporary achievements.