One verse

Srimad Bhagavatam 9.2.14

9.2.14

एवं वृत्तो वनं गत्वा दृष्ट्वा दावाग्निमुत्थितम् । तेनोपयुक्तकरणो ब्रह्म प्राप परं मुनि: ॥ १४ ॥

evam vrtto vanam gatva drstva davagnim utthitam tenopayukta-karano brahma prapa param munih

evam vrttah
being situated in such an order of life
vanam
to the forest
gatva
after going
drstva
when he saw
dava-agnim
a forest fire
utthitam
existing there
tena
by that (fire)
upayukta-karanah
engaging all the senses of the body by burning
brahma
transcendence
prapa
he achieved
param
the ultimate goal
munih
as a great saintly person.

With this attitude, Prsadhra became a great saint, and when he entered the forest and saw a blazing forest fire, he took this opportunity to burn his body in the fire. Thus he achieved the transcendental, spiritual world.