Mahabharata 12.330.7

यास्को मामृषिरव्यग्रो नैकयज्ञेषु गीतवान्शिपिविष्ट इति ह्यस्माद्गुह्यनामधरो ह्यहम्

yāsko māmṛṣiravyagro naikayajñeṣu gītavānśipiviṣṭa iti hyasmādguhyanāmadharo hyaham

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