One verse

Srimad Bhagavatam 3.20.49

3.20.49

स आत्मान् मन्यमान: कृतकृत्यमिवात्मभू: । तदा मनून् ससर्जान्ते मनसा लोकभावनान् ॥ ४९ ॥

sa atmanam manyamanah krta-krtyam ivatmabhuh tada manun sasarjante manasa loka-bhavanan

sah
Lord Brahma
atmanam
himself
manyamanah
considering
krta-krtyam
had accomplished the object of life
iva
as if
atmabhuh
born from the Supreme
tada
then
manun
the Manus
sasarja
created
ante
at the end
manasa
from his mind
loka
of the world
bhavanan
promoting the welfare.

One day Brahma, the self-born, the first living creature, felt as if the object of his life had been accomplished. At that time he evolved from his mind the Manus, who promote the welfare activities or the universe.