Mahabharata 12.172.34

न हृदयमनुरुध्यते मनो वा; प्रियसुखदुर्लभतामनित्यतां चतदुभयमुपलक्षयन्निवाहं; व्रतमिदमाजगरं शुचिश्चरामि

na hṛdayamanurudhyate mano vā; priyasukhadurlabhatāmanityatāṃ catadubhayamupalakṣayannivāhaṃ; vratamidamājagaraṃ śuciścarāmi

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