Śrī Kāmākṣī–Mahātripurasundarī: Immanence of Śakti and Cosmic Administration
Lalitopākhyāna
तस्मात्पापस्य शान्त्यर्थं तपः कुरु सुदुष्करम् / गत्वा काशीं व्रतं तत्र किञ्चित्कालं समाचर
tasmātpāpasya śāntyarthaṃ tapaḥ kuru suduṣkaram / gatvā kāśīṃ vrataṃ tatra kiñcitkālaṃ samācara
Therefore, to bring peace to your sin, perform austerity most difficult. Go to Kāśī and observe a sacred vow there for some time.