Mahabharata 12.204.10
कर्म तत्कुरुते तर्षादहंकारपरिग्रहम्कार्यकारणसंयोगे स हेतुरुपपादितः
karma tatkurute tarṣādahaṃkāraparigrahamkāryakāraṇasaṃyoge sa heturupapāditaḥ
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book