Mahabharata 3.264.42

भर्तृस्मरणतन्वङ्गी तापसीवेषधारिणीउपवासतपःशीला तत्र सा पृथुलेक्षणाउवास दुःखवसतीः फलमूलकृताशना

bhartṛsmaraṇatanvaṅgī tāpasīveṣadhāriṇīupavāsatapaḥśīlā tatra sā pṛthulekṣaṇāuvāsa duḥkhavasatīḥ phalamūlakṛtāśanā

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