Mahabharata 5.36.7

मर्माण्यस्थीनि हृदयं तथासू;न्घोरा वाचो निर्दहन्तीह पुंसाम्तस्माद्वाचं रुशतीं रूक्षरूपां; धर्मारामो नित्यशो वर्जयीत

marmāṇyasthīni hṛdayaṃ tathāsū;nghorā vāco nirdahantīha puṃsāmtasmādvācaṃ ruśatīṃ rūkṣarūpāṃ; dharmārāmo nityaśo varjayīta

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