Manusmriti

siva.sh/manusmriti/11/258

अरण्ये वा त्रिरभ्यस्य प्रयतो वेदसंहिताम् । मुच्यते पातकैः सर्वैः पराकैः शोधितस्त्रिभिः ॥ २५८ ॥

sanskrit

Or if, pure (in mind and in body), he thrice repeats the Samhita of the Veda in a forest, sanctified by three Paraka (penances), he is freed from all crimes causing loss of caste (pataka).

english translation

araNye vA trirabhyasya prayato vedasaMhitAm | mucyate pAtakaiH sarvaiH parAkaiH zodhitastribhiH || 258 ||

hk transliteration by Sanscript