Shiva Purana
न केवलं भवेत्पापं निन्दाकर्तुः शिवस्य हि ॥ यो वै शृणोति तन्निन्दां पापभाक्स भवेदिह ॥ ४९॥
It is not only the censurer of Śiva who becomes sinful but also he who listens to such insults.
english translation
na kevalaM bhavetpApaM nindAkartuH zivasya hi ॥ yo vai zRNoti tannindAM pApabhAksa bhavediha ॥ 49॥
hk transliteration by Sanscript