Mahabharata 3.30.4

क्रुद्धः पापं नरः कुर्यात्क्रुद्धो हन्याद्गुरूनपिक्रुद्धः परुषया वाचा श्रेयसोऽप्यवमन्यते

kruddhaḥ pāpaṃ naraḥ kuryātkruddho hanyādgurūnapikruddhaḥ paruṣayā vācā śreyaso'pyavamanyate

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