Mahabharata 1.58.17

ईजिरे च महायज्ञैः क्षत्रिया बहुदक्षिणैःसाङ्गोपनिषदान्वेदान्विप्राश्चाधीयते तदा

ījire ca mahāyajñaiḥ kṣatriyā bahudakṣiṇaiḥsāṅgopaniṣadānvedānviprāścādhīyate tadā

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