One verse

Srimad Bhagavatam 7.7.25

7.7.25

बुद्धेर्जागरणं स्वप्न: सुषुप्तिरिति वृत्तय: । ता येनैवानुभूयन्ते सोऽध्यक्ष: पुरुष: पर: ॥ २५ ॥

buddher jagaranam svapnah susuptir iti vrttayah ta yenaivanubhuyante so ’dhyaksah purusah parah

buddheh
of the intelligence
jagaranam
the waking or active state of the gross senses
svapnah
dreaming (the activity of the senses without the gross body)
susuptih
deep sleep or cessation of all activities (although the living entity is the seer)
iti
thus
vrttayah
the various transactions
tah
they
yena
by whom
eva
indeed
anubhuyante
are perceived
sah
that
adhyaksah
overseer (who is different from the activities)
purusah
the enjoyer
parah
transcendental

Intelligence can be perceived in three states of activity—wakefulness, dreaming and deep sleep. The person who perceives these three is to be considered the original master, the ruler, the Supreme Personality of Godhead.