Mahabharata 3.91.19

युधिष्ठिर यमौ भीम मनसा कुरुतार्जवम्मनसा कृतशौचा वै शुद्धास्तीर्थानि गच्छत

yudhiṣṭhira yamau bhīma manasā kurutārjavammanasā kṛtaśaucā vai śuddhāstīrthāni gacchata

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