Mahabharata 8.49.25

इदं धर्मरहस्यं च वक्ष्यामि भरतर्षभयद्ब्रूयात्तव भीष्मो वा धर्मज्ञो वा युधिष्ठिरः

idaṃ dharmarahasyaṃ ca vakṣyāmi bharatarṣabhayadbrūyāttava bhīṣmo vā dharmajño vā yudhiṣṭhiraḥ

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