Mahabharata 3.33.21

कारणं तस्य देहोऽयं धातुः कर्मणि कर्मणिस यथा प्रेरयत्येनं तथायं कुरुतेऽवशः

kāraṇaṃ tasya deho'yaṃ dhātuḥ karmaṇi karmaṇisa yathā prerayatyenaṃ tathāyaṃ kurute'vaśaḥ

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