Mahabharata 5.187.15

न हि मां क्षत्रियः कश्चिद्वीर्येण विजयेद्युधिऋते ब्रह्मविदस्तात तपसा संशितव्रतात्

na hi māṃ kṣatriyaḥ kaścidvīryeṇa vijayedyudhiṛte brahmavidastāta tapasā saṃśitavratāt

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