One verse

Srimad Bhagavatam 10.86.45

10.86.45

यथा शयान: पुरुषो मनसैवात्ममायया । सृष्ट्वा लोकं परं स्वाप्नमनुविश्यावभासते ॥ ४५ ॥

yathā śayānaḥ puruṣo manasaivātma-māyayā sṛṣṭvā lokaṁ paraṁ svāpnam anuviśyāvabhāsate

yathā
as
śayānaḥ
sleeping
puruṣaḥ
a person
manasā
with his mind
eva
alone
ātma
own
māyayā
by his imagination
sṛṣṭvā
creating
lokam
a world
param
separate
svāpnam
dream
anuviśya
entering
avabhāsate
he appears

The Lord is like a sleeping person who creates a separate world in his imagination and then enters his own dream and sees himself within it.