One verse

Srimad Bhagavatam 3.12.4

3.12.4

सनकं च सनन्दं च सनातनमथात्मभू: । सनत्कुमारं च मुनीन्निष्क्रियानूर्ध्वरेतस: ॥ ४ ॥

sanakam ca sanandam ca sanatanam athatmabhuh sanat-kumaram ca munin niskriyan urdhva-retasah

sanakam
Sanaka
ca
also
sanandam
Sananda
ca
and
sanatanam
Sanatana
atha
thereafter
atma-bhuh
Brahma, who is self-born
sanat-kumaram
Sanat-kumara
ca
also
munin
the great sages
niskriyan
free from all fruitive action
urdhva-retasah
those whose semen flows upwards.

In the beginning, Brahma created four great sages named Sanaka, Sananda, Sanatana and Sanat-kumara. All of them were unwilling to adopt materialistic activities because they were highly elevated due to their semen’s flowing upwards.