One verse

Srimad Bhagavatam 3.5.25

3.5.25

सा वा एतस्य संद्रष्टु: शक्ति: सदसदात्मिका । माया नाम महाभाग ययेदं निर्ममे विभु: ॥ २५ ॥

sa va etasya samdrastuh saktih sad-asad-atmika maya nama maha-bhaga yayedam nirmame vibhuh

sa
that external energy
va
is either
etasya
of the Lord
samdrastuh
of the perfect seer
saktih
energy
sat-asat-atmika
as both the cause and the effect
maya nama
called by the name maya
maha-bhaga
O fortunate one
yaya
by which
idam
this material world
nirmame
constructed
vibhuh
the Almighty.

The Lord is the seer, and the external energy, which is seen, works as both cause and effect in the cosmic manifestation. O greatly fortunate Vidura, this external energy is known as maya or illusion, and through her agency only is the entire material manifestation made possible.