Mahabharata 8.66.5

ततो रिपुघ्नं समधत्त कर्णः; सुसंशितं सर्पमुखं ज्वलन्तम्रौद्रं शरं संयति सुप्रधौतं; पार्थार्थमत्यर्थचिराय गुप्तम्

tato ripughnaṃ samadhatta karṇaḥ; susaṃśitaṃ sarpamukhaṃ jvalantamraudraṃ śaraṃ saṃyati supradhautaṃ; pārthārthamatyarthacirāya guptam

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