Mahabharata 12.86.7
चतुरो ब्राह्मणान्वैद्यान्प्रगल्भान्सात्त्विकाञ्शुचीन्त्रींश्च शूद्रान्विनीतांश्च शुचीन्कर्मणि पूर्वके
caturo brāhmaṇānvaidyānpragalbhānsāttvikāñśucīntrīṃśca śūdrānvinītāṃśca śucīnkarmaṇi pūrvake
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book