One verse

Srimad Bhagavatam 4.25.2

4.25.2

रुद्रगीतं भगवत: स्तोत्रं सर्वे प्रचेतस: । जपन्तस्ते तपस्तेपुर्वर्षाणामयुतं जले ॥ २ ॥

rudra-gitam bhagavatah stotram sarve pracetasah japantas te tapas tepur varsanam ayutam jale

rudra-gitam
the song sung by Lord Siva
bhagavatah
of the Lord
stotram
prayer
sarve
all
pracetasah
the princes known as the Pracetas
japantah
reciting
te
all of them
tapah
austerity
tepuh
executed
varsanam
of years
ayutam
ten thousand
jale
within the water.

All the Praceta princes simply stood in the water for ten thousand years and recited the prayers given to them by Lord Siva.