Mahabharata 13.17.121

मूलो विशालो ह्यमृतो व्यक्ताव्यक्तस्तपोनिधिःआरोहणो निरोहश्च शैलहारी महातपाः

mūlo viśālo hyamṛto vyaktāvyaktastaponidhiḥārohaṇo nirohaśca śailahārī mahātapāḥ

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