Mahabharata 3.30.8

3.30.8

taṃ krodhaṃ varjitaṃ dhīraiḥ kathamasmadvidhaścaret |
etaddraupadi saṃdhāya na me manyuḥ pravardhate || 8 ||

Yudhishthira said, 'Anger is the slayer of men and is again their prosperor. Know this, O thou possessed of great wisdom, that anger is the root of all prosperity and all adversity. O thou beautiful one, he that suppresseth his anger earneth prosperity. That man, again, who always giveth way to anger, reapeth adversity from his fierce anger. It is seen in this world that anger is the cause of destruction of every creature. How then can one like me indulge his anger which is so destructive of the world? The angry man commiteth sin. The angry man killeth even his preceptors. The angry man insulteth even his superiors in harsh words. The man that is angry faileth to distinguish between what should be said and what should not. There is no act that an angry man may not do, no word that an angry man may not utter. From anger a man may slay one that deserveth not to be slain, and may worship one that deserveth to be slain. The angry man may even send his own soul to the regions of Yama. Beholding all these faults, the wise control their anger, desirous of obtaining high prosperity both in this and the other world. It is for this that they of tranquil souls have banished wrath. How can one like us indulge in it then? O daughter of Drupada, reflecting upon all this, my anger is not excited One that acteth not against a man whose wrath hath been up, rescueth himself as also others from great fear. In fact, he may be regarded to be the physician of the two (viz., himself and angry man).