Mahabharata 3.180.5

बहुवत्सरजीवी च मार्कण्डेयो महातपाःस्वाध्यायतपसा युक्तः क्षिप्रं युष्मान्समेष्यति

bahuvatsarajīvī ca mārkaṇḍeyo mahātapāḥsvādhyāyatapasā yuktaḥ kṣipraṃ yuṣmānsameṣyati

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