Mahabharata 7.106.9

भीमो वा सूतपुत्रेण स्मरन्वैरं पुरा कृतम्सोऽयुध्यत कथं वीरः कर्णेन सह संयुगे

bhīmo vā sūtaputreṇa smaranvairaṃ purā kṛtamso'yudhyata kathaṃ vīraḥ karṇena saha saṃyuge

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