Mahabharata 12.119.18

नित्ययुक्ताश्च ते भृत्या भवन्तु रणकोविदाःवाजिनां च प्रयोगेषु वैशारद्यमिहेष्यते

nityayuktāśca te bhṛtyā bhavantu raṇakovidāḥvājināṃ ca prayogeṣu vaiśāradyamiheṣyate

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