Bhagavatapurana 6.4.47

6.4.47

ahamevāsamevāgre nānyat kiñcāntaraṃ bahiḥ /
saṃjñānamātramavyaktaṃ prasuptamiva viśvataḥ //

47. I alone existed in the beginning (without any activity); there was nothing else within (as the knower) and there was nothing else outside (as the known); it was mere consciousness, unmanifest, as if there were a sleep everywhere.