Devibhagavatapurana 4.2.14

4.2.14

teneha śāśvataṃ sarvaṃ jagatsthāvarajaṅgamam |
nityānityavicāre'tra nimagnā munayaḥ sadā ||

For this reason, this whole Universe, moveable and immoveable, is real; but Munis are deeply absorbed in meditation to ascertain about its reality or unreality. They cannot definitely know it for certain whether this world is real or unreal; for where Mâyâ is prevalent, the universe is there. Where there is the cause fully existing in all respects, there is no effect, how can we say? The Mâyâ is eternal and always acts as the Prime Cause of all.