Kāraṇodakaśāyī Viṣṇu—Mahā-Viṣṇu, the expansion of the Supreme Lord from whom all material universes emanate. He lies within the Causal Ocean and breathes out innumerable universes.

Karanodakasayi Visnu-Maha-Visnu, the expansion of the Supreme Lord from whom all material universes emanate. He lies within the Causal Ocean and breathes out innumerable universes.
 

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