Mahabharata 12.15.14

नाच्छित्त्वा परमर्माणि नाकृत्वा कर्म दारुणम्नाहत्वा मत्स्यघातीव प्राप्नोति महतीं श्रियम्

nācchittvā paramarmāṇi nākṛtvā karma dāruṇamnāhatvā matsyaghātīva prāpnoti mahatīṃ śriyam

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