Mahabharata 5.177.13

ब्राह्मणः क्षत्रियो वैश्यः शूद्रश्चैव रणे यदिब्रह्मद्विड्भविता तं वै हनिष्यामीति भार्गव

brāhmaṇaḥ kṣatriyo vaiśyaḥ śūdraścaiva raṇe yadibrahmadviḍbhavitā taṃ vai haniṣyāmīti bhārgava

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