Mahabharata 2.18.14

न शौरिणा विना पार्थो न शौरिः पाण्डवं विनानाजेयोऽस्त्यनयोर्लोके कृष्णयोरिति मे मतिः

na śauriṇā vinā pārtho na śauriḥ pāṇḍavaṃ vinānājeyo'styanayorloke kṛṣṇayoriti me matiḥ

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