Mahabharata 3.38.9
कृष्णद्वैपायनात्तात गृहीतोपनिषन्मयातया प्रयुक्तया सम्यग्जगत्सर्वं प्रकाशतेतेन त्वं ब्रह्मणा तात संयुक्तः सुसमाहितः
kṛṣṇadvaipāyanāttāta gṛhītopaniṣanmayātayā prayuktayā samyagjagatsarvaṃ prakāśatetena tvaṃ brahmaṇā tāta saṃyuktaḥ susamāhitaḥ
Our plain-language meaning of this verse is waiting for scholar review.