Shiva Purana

siva.sh/siva-purana/kotirudra-samhita/23/51

तदा सर्वाणि पापानि भस्मसाच्च भवंति हि ।। तस्मात्काशीं नरस्सेवेत्कर्मनिर्मूलनीं ध्रुवम् ।। ५१।।

sanskrit

Then his sins are reduced to ashes. Hence a man shall resort to Kāśī. That certainly debars Karmans to fructify.

english translation

tadA sarvANi pApAni bhasmasAcca bhavaMti hi || tasmAtkAzIM narassevetkarmanirmUlanIM dhruvam || 51||

hk transliteration by Sanscript