Mahabharata 1.155.5

अभितः सोऽथ कल्माषीं गङ्गाकूले परिभ्रमन्ब्राह्मणावसथं पुण्यमाससाद महीपतिः

abhitaḥ so'tha kalmāṣīṃ gaṅgākūle paribhramanbrāhmaṇāvasathaṃ puṇyamāsasāda mahīpatiḥ

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