Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 25

Sanskrit:

बुद्धेर्जागरणं स्वप्न: सुषुप्तिरिति चोच्यते ।मायामात्रमिदं राजन् नानात्वं प्रत्यगात्मनि ॥ २५ ॥

ITRANS:

buddher jāgaraṇaṁ svapnaḥsuṣuptir iti cocyatemāyā-mātram idaṁ rājannānātvaṁ pratyag-ātmani

Translation:

The three states of intelligence are called waking consciousness, sleep and deep sleep. But, my dear King, the variegated experiences created for the pure living entity by these different states are nothing more than illusion.

Purport:

Pure Kṛṣṇa consciousness exists beyond the various stages of material awareness. Just as darkness vanishes in the presence of light, so illusory material intelligence, which is experienced as normal perception, dreaming and deep sleep, completely vanishes in the brilliant presence of pure Kṛṣṇa consciousness, the constitutional condition of every living entity.