One verse

Srimad Bhagavatam 7.12.22

7.12.22

चरेद्वने द्वादशाब्दानष्टौ वा चतुरो मुनि: । द्वावेकं वा यथा बुद्धिर्न विपद्येत कृच्छ्रत: ॥ २२ ॥

cared vane dvadasabdan astau va caturo munih dvav ekam va yatha buddhir na vipadyeta krcchratah

caret
should remain
vane
in the forest
dvadasa-abdan
twelve years
astau
for eight years
va
either
caturah
four years
munih
a saintly, thoughtful man
dvau
two
ekam
one
va
either
yatha
as well as
buddhih
intelligence
na
not
vipadyeta
bewildered
krcchratah
because of hard austerities.

Being very thoughtful, a vanaprastha should remain in the forest for twelve years, eight years, four years, two years or at least one year. He should behave in such a way that he will not be disturbed or troubled by too much austerity.