One verse

Srimad Bhagavatam 6.1.41

6.1.41

येन स्वधाम्न्यमी भावा रज:सत्त्वतमोमया: । गुणनामक्रियारूपैर्विभाव्यन्ते यथातथम् ॥ ४१ ॥

yena sva-dhamny ami bhava rajah-sattva-tamomayah guna-nama-kriya-rupair vibhavyante yatha-tatham

yena
by whom (Narayana)
sva-dhamni
although in His own place, the spiritual world
ami
all these
bhavah
manifestations
rajah-sattva-tamah-mayah
created by the three modes of material nature (passion, goodness and ignorance)
guna
qualities
nama
names
kriya
activities
rupaih
and with forms
vibhavyante
are variously manifested
yatha-tatham
exactly to the right point.

The supreme cause of all causes, Narayana, is situated in His own abode in the spiritual world, but nevertheless He controls the entire cosmic manifestation according to the three modes of material nature—sattva-guna, rajo-guna and tamo-guna. In this way all living entities are awarded different qualities, different names (such as brahmana, ksatriya and vaisya), different duties according to the varnasrama institution, and different forms. Thus Narayana is the cause of the entire cosmic manifestation.