Mahabharata 7.69.28

अपि शक्यो रणे जेतुं वज्रहस्तः पुरंदरःनार्जुनः समरे शक्यो जेतुं परपुरंजयः

api śakyo raṇe jetuṃ vajrahastaḥ puraṃdaraḥnārjunaḥ samare śakyo jetuṃ parapuraṃjayaḥ

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