Mahabharata 12.280.10

विरक्तं शोध्यते वस्त्रं न तु कृष्णोपसंहितम्प्रयत्नेन मनुष्येन्द्र पापमेवं निबोध मे

viraktaṃ śodhyate vastraṃ na tu kṛṣṇopasaṃhitamprayatnena manuṣyendra pāpamevaṃ nibodha me

Our plain-language meaning of this verse is waiting for scholar review.