Mahabharata 12.94.38

एतां राजोपनिषदं ययातिः स्माह नाहुषःमनुष्यविजये युक्तो हन्ति शत्रूननुत्तमान्

etāṃ rājopaniṣadaṃ yayātiḥ smāha nāhuṣaḥmanuṣyavijaye yukto hanti śatrūnanuttamān

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