Mahabharata 1.56.9

कथं धर्मभृतां श्रेष्ठः सुतो धर्मस्य धर्मवित्अनर्हः परमं क्लेशं सोढवान्स युधिष्ठिरः

kathaṃ dharmabhṛtāṃ śreṣṭhaḥ suto dharmasya dharmavitanarhaḥ paramaṃ kleśaṃ soḍhavānsa yudhiṣṭhiraḥ

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