Mahabharata 12.138.13

वाङ्मात्रेण विनीतः स्याद्धृदयेन यथा क्षुरःश्लक्ष्णपूर्वाभिभाषी च कामक्रोधौ विवर्जयेत्

vāṅmātreṇa vinītaḥ syāddhṛdayena yathā kṣuraḥślakṣṇapūrvābhibhāṣī ca kāmakrodhau vivarjayet

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