Shiva Purana
यया स्यान्निर्वृतिः सद्यस्सैव तीव्रतरा मता ॥ तीव्रा तु जीवतोत्यंतं पुंसः पापविशोधिका ॥ ९ ॥
That is Tivratara whereby the bliss is immediately attained. The acute one purifies the sin of the living man effectively.
english translation
yayA syAnnirvRtiH sadyassaiva tIvratarA matA ॥ tIvrA tu jIvatotyaMtaM puMsaH pApavizodhikA ॥ 9 ॥
hk transliteration by Sanscript