One verse

Srimad Bhagavatam 7.3.19

7.3.19

नैतत्पूर्वर्षयश्चक्रुर्न करिष्यन्ति चापरे । निरम्बुर्धारयेत्प्राणान् को वै दिव्यसमा: शतम् ॥ १९ ॥

naitat purvarsayas cakrur na karisyanti capare nirambur dharayet pranan ko vai divya-samah satam

na
not
etat
this
purva-rsayah
the sages before you, such as Bhrgu
cakruh
executed
na
nor
karisyanti
will execute
ca
also
apare
others
nirambuh
without drinking water
dharayet
can sustain
pranan
the life air
kah
who
vai
indeed
divya-samah
celestial years
satam
one hundred.

Even saintly persons like Bhrgu, born previously, could not perform such severe austerities, nor will anyone in the future be able to do so. Who within these three worlds can sustain his life without even drinking water for one hundred celestial years?