Mahabharata 12.156.12

दमो नान्यस्पृहा नित्यं धैर्यं गाम्भीर्यमेव चअभयं क्रोधशमनं ज्ञानेनैतदवाप्यते

damo nānyaspṛhā nityaṃ dhairyaṃ gāmbhīryameva caabhayaṃ krodhaśamanaṃ jñānenaitadavāpyate

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