One verse

Srimad Bhagavatam 7.3.2

7.3.2

स तेपे मन्दरद्रोण्यां तप: परमदारुणम् । ऊर्ध्वबाहुर्नभोद‍ृष्टि: पादाङ्गुष्ठाश्रितावनि: ॥ २ ॥

sa tepe mandara-dronyam tapah parama-darunam urdhva-bahur nabho-drstih padangusthasritavanih

sah
he (Hiranyakasipu)
tepe
performed
mandara-dronyam
in a valley of Mandara Hill
tapah
austerity
parama
most
darunam
difficult
urdhva
raising
bahuh
arms
nabhah
toward the sky
drstih
his vision
pada-angustha
with the big toes of his feet
asrita
resting on
avanih
the ground.

In the valley of Mandara Hill, Hiranyakasipu began performing his austerities by standing with his toes on the ground, keeping his arms upward and looking toward the sky. This position was extremely difficult, but he accepted it as a means to attain perfection.