योगवासिष्ठः
yogavāsiṣṭhaḥ
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book-7, chapter-167, verse-17
इदं जाग्रदयं स्वप्नः सुषुप्तं तुर्यमित्यपि ।
कृतं नाम स्वयं चित्वाद्ब्रह्म वात्मेति चात्मनि ॥ १७ ॥
कृतं नाम स्वयं चित्वाद्ब्रह्म वात्मेति चात्मनि ॥ १७ ॥
idaṃ jāgradayaṃ svapnaḥ suṣuptaṃ turyamityapi ,
kṛtaṃ nāma svayaṃ citvādbrahma vātmeti cātmani 17
kṛtaṃ nāma svayaṃ citvādbrahma vātmeti cātmani 17
17.
These are the three states of waking, dreaming and sleep, together with a fourth called-the turiya or the state of sound sleep, and these names are applied to the soul by the Supreme soul itself.