Mahabharata 3.273.19

अविध्यदिन्द्रजित्तीक्ष्णैः सौमित्रिं मर्मभेदिभिःसौमित्रिश्चानलस्पर्शैरविध्यद्रावणिं शरैः

avidhyadindrajittīkṣṇaiḥ saumitriṃ marmabhedibhiḥsaumitriścānalasparśairavidhyadrāvaṇiṃ śaraiḥ

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