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.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
अहमेवासमेवाग्रे नान्यत्किञ्चान्तरं बहिः । संज्ञानमात्रमव्यक्तं प्रसुप्तमिव विश्वतः
ahamevāsamevāgre nānyatkiñcāntaraṃ bahiḥ | saṃjñānamātramavyaktaṃ prasuptamiva viśvataḥ
SB 6.4.47