One verse

Srimad Bhagavatam 2.7.5

2.7.5

तप्तं तपो विविधलोकसिसृक्षया मे आदौ सनात् स्वतपस: स चतु:सनोऽभूत् । प्राक्कल्पसम्प्लवविनष्टमिहात्मतत्त्वं सम्यग् जगाद मुनयो यदचक्षतात्मन् ॥ ५ ॥

taptam tapo vividha-loka-sisrksaya me adau sanat sva-tapasah sa catuh-sano ’bhut prak-kalpa-samplava-vinastam ihatma-tattvam samyag jagada munayo yad acaksatatman

taptam
having undergone austerities
tapah
penance
vividha-loka
different planetary systems
sisrksaya
desiring to create
me
of mine
adau
at first
sanat
from the Personality of Godhead
sva-tapasah
by dint of my own penances
sah
He (the Lord)
catuh-sanah
the four bachelors named Sanat-kumara, Sanaka, Sanandana and Sanatana
abhut
appeared
prak
previous
kalpa
creation
samplava
in the inundation
vinastam
devastated
iha
in this material world
atma
the spirit
tattvam
truth
samyak
in complete
jagada
became manifested
munayah
sages
yat
that which
acaksata
saw clearly
atman
the spirit

To create different planeary systems I had to undergo austerities and penance, and the Lord, thus being pleased with me, incarnated in four sanas (Sanaka, Sanat-kumara, Sanandana and Sanatana). In the previous creation the spiritual truth was devastated, but the four sanas explained it so nicely that the truth at once became clearly perceived by the sages.