Shiva Purana
कामनाफलमुद्दिश्य राजसं तप उच्यते ॥ निजदेहं सुसंपीड्य देहशोषकदुस्सहैः ॥ १३ ॥
The Rājasa penance is performed with a specific desire as the fruit. Here the body is subjected to tortures and unbearable whithering and macerating processes.
english translation
kAmanAphalamuddizya rAjasaM tapa ucyate ॥ nijadehaM susaMpIDya dehazoSakadussahaiH ॥ 13 ॥
hk transliteration by Sanscript