Manusmriti

siva.sh/manusmriti/11/214

तप्तकृच्छ्रं चरन् विप्रो जलक्षीरघृतानिलान् । प्रतित्र्यहं पिबेदुष्णान् सकृत्स्नायी समाहितः ॥ २१४ ॥

sanskrit

A Brahmana who performs a Taptakrikkhra (penance) must drink hot water, hot milk, hot clarified butter and (inhale) hot air, each during three days, and bathe once with a concentrated mind.

english translation

taptakRcchraM caran vipro jalakSIraghRtAnilAn | pratitryahaM pibeduSNAn sakRtsnAyI samAhitaH || 214 ||

hk transliteration by Sanscript