Mahabharata 12.289.44

भुञ्जानो यावकं रूक्षं दीर्घकालमरिंदमएकारामो विशुद्धात्मा योगी बलमवाप्नुयात्

bhuñjāno yāvakaṃ rūkṣaṃ dīrghakālamariṃdamaekārāmo viśuddhātmā yogī balamavāpnuyāt

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