Mahabharata 1.1.154

यदाश्रौषं भीमसेनानुयातेन; अश्वत्थाम्ना परमास्त्रं प्रयुक्तम्क्रुद्धेनैषीकमवधीद्येन गर्भं; तदा नाशंसे विजयाय संजय

yadāśrauṣaṃ bhīmasenānuyātena; aśvatthāmnā paramāstraṃ prayuktamkruddhenaiṣīkamavadhīdyena garbhaṃ; tadā nāśaṃse vijayāya saṃjaya

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