Mahabharata 8.9.12

तावेनं भ्रातरौ वीरं जघ्नतुर्हृदये भृशम्विषाणाभ्यां यथा नागौ प्रतिनागं महाहवे

tāvenaṃ bhrātarau vīraṃ jaghnaturhṛdaye bhṛśamviṣāṇābhyāṃ yathā nāgau pratināgaṃ mahāhave

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