Mahabharata 3.206.21

न विषादे मनः कार्यं विषादो विषमुत्तमम्मारयत्यकृतप्रज्ञं बालं क्रुद्ध इवोरगः

na viṣāde manaḥ kāryaṃ viṣādo viṣamuttamammārayatyakṛtaprajñaṃ bālaṃ kruddha ivoragaḥ

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