Mahabharata 8.17.18

आचार्यपुत्रे निहते हस्तिशिक्षाविशारदेअङ्गाः क्रुद्धा महामात्रा नागैर्नकुलमभ्ययुः

ācāryaputre nihate hastiśikṣāviśāradeaṅgāḥ kruddhā mahāmātrā nāgairnakulamabhyayuḥ

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