One verse

Srimad Bhagavatam 6.4.47

6.4.47

अहमेवासमेवाग्रे नान्यत् किञ्चान्तरं बहि: । संज्ञानमात्रमव्यक्तं प्रसुप्तमिव विश्वत: ॥ ४७ ॥

aham evasam evagre nanyat kincantaram bahih samjnana-matram avyaktam prasuptam iva visvatah

aham
I, the Supreme Personality of Godhead
eva
only
asam
was
eva
certainly
agre
in the beginning, before the creation
na
not
anyat
other
kinca
anything
antaram
besides Me
bahih
external (since the cosmic manifestation is external to the spiritual world, the spiritual world existed when there was no material world)
samjnana-matram
only the consciousness of the living entities
avyaktam
unmanifested
prasuptam
sleeping
iva
like
visvatah
all over

Before the creation of this cosmic manifestation, I alone existed with My specific spiritual potencies. Consciousness was then unmanifested, just as one’s consciousness is unmanifested during the time of sleep.