Mahabharata 13.41.26

अमरोऽस्मीति यद्बुद्धिमेतामास्थाय वर्तसेमावमंस्था न तपसामसाध्यं नाम किंचन

amaro'smīti yadbuddhimetāmāsthāya vartasemāvamaṃsthā na tapasāmasādhyaṃ nāma kiṃcana

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