Mahabharata 12.142.17

यास्माकं विहिता वृत्तिः कापोती जातिधर्मतःसा न्याय्यात्मवता नित्यं त्वद्विधेनाभिवर्तितुम्

yāsmākaṃ vihitā vṛttiḥ kāpotī jātidharmataḥsā nyāyyātmavatā nityaṃ tvadvidhenābhivartitum

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