Mahabharata 1.41.25

यमाखुं पश्यसि ब्रह्मन्काल एष महाबलःस तं तपोरतं मन्दं शनैः क्षपयते तुदन्जरत्कारुं तपोलुब्धं मन्दात्मानमचेतसम्

yamākhuṃ paśyasi brahmankāla eṣa mahābalaḥsa taṃ taporataṃ mandaṃ śanaiḥ kṣapayate tudanjaratkāruṃ tapolubdhaṃ mandātmānamacetasam

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