Shiva Purana

siva.sh/siva-purana/uma-samhita/20/13

कामनाफलमुद्दिश्य राजसं तप उच्यते ।। निजदेहं सुसंपीड्य देहशोषकदुस्सहैः ।। १३ ।।

sanskrit

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