Mahabharata 3.32.10

प्रत्यक्षं हि त्वया दृष्ट ऋषिर्गच्छन्महातपाःमार्कण्डेयोऽप्रमेयात्मा धर्मेण चिरजीविताम्

pratyakṣaṃ hi tvayā dṛṣṭa ṛṣirgacchanmahātapāḥmārkaṇḍeyo'prameyātmā dharmeṇa cirajīvitām

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