Significance of Yogic sleep
Yogic sleep, as detailed in the Purana, describes a profound state of rest exemplified by Bhagavan Vishnu. This concept encompasses three interpretations: first, it signifies the deep sleep Vishnu experiences after exhausting battles; second, it represents a meditational state that persists until the universe is prepared for creation; and third, it reflects Vishnu's repose upon the water, where he contemplates his divine essence as Vasudeva.
Synonyms: Conscious sleep, Sleep yoga, Deep relaxation., Nidra, Yoganidra, Psychic sleep, Deep relaxation, Guided meditation
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Hindu concept of 'Yogic sleep'
Yogic sleep in Hinduism can be interpreted as a profound state of deep sleep or meditation, epitomized by Bhagavan Vishnu's restful contemplation on water, awaiting the renewal of the universe after exhaustive battles.
From: Devi Bhagavata Purana
(1) A state of deep sleep that Bhagavan Vishnu fell into after being exceedingly tired from prolonged battles.[1]