Mahabharata 12.168.1

युधिष्ठिर उवाच · yudhiṣṭhira uvāca

धर्माः पितामहेनोक्ता राजधर्माश्रिताः शुभाःधर्ममाश्रमिणां श्रेष्ठं वक्तुमर्हसि पार्थिव

dharmāḥ pitāmahenoktā rājadharmāśritāḥ śubhāḥdharmamāśramiṇāṃ śreṣṭhaṃ vaktumarhasi pārthiva

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