Mahabharata 12.227.10

एषा पूर्वतरा वृत्तिर्ब्राह्मणस्य विधीयतेज्ञानागमेन कर्माणि कुर्वन्कर्मसु सिध्यति

eṣā pūrvatarā vṛttirbrāhmaṇasya vidhīyatejñānāgamena karmāṇi kurvankarmasu sidhyati

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