Mahabharata 14.13.16
यो मां प्रयतते हन्तुं तपसा संशितव्रतःततस्तपसि तस्याथ पुनः प्रादुर्भवाम्यहम्
yo māṃ prayatate hantuṃ tapasā saṃśitavrataḥtatastapasi tasyātha punaḥ prādurbhavāmyaham
Our plain-language meaning of this verse is waiting for scholar review.