One verse

Srimad Bhagavatam 3.6.8

3.6.8

एष ह्यशेषसत्त्वानामात्मांश: परमात्मन: । आद्योऽवतारो यत्रासौ भूतग्रामो विभाव्यते ॥ ८ ॥

esa hy asesa-sattvanam atmamsah paramatmanah adyo ’vataro yatrasau bhuta-gramo vibhavyate

esah
this
hi
certainly
asesa
unlimited
sattvanam
living entities
atma
Self
amsah
part
parama-atmanah
of the Supersoul
adyah
the first
avatarah
incarnation
yatra
whereupon
asau
all those
bhuta-gramah
the aggregate creations
vibhavyate
flourish.

The gigantic universal form of the Supreme Lord is the first incarnation and plenary portion of the Supersoul. He is the Self of an unlimited number of living entities, and in Him rests the aggregate creation, which thus flourishes.