Mahabharata 3.187.13

ब्रह्म वक्त्रं भुजौ क्षत्रमूरू मे संश्रिता विशःपादौ शूद्रा भजन्ते मे विक्रमेण क्रमेण च

brahma vaktraṃ bhujau kṣatramūrū me saṃśritā viśaḥpādau śūdrā bhajante me vikrameṇa krameṇa ca

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