Mahabharata 12.230.2

तत्र चेन्न भवेदेवं संशयः कर्मनिश्चयेकिं नु कर्म स्वभावोऽयं ज्ञानं कर्मेति वा पुनः

tatra cenna bhavedevaṃ saṃśayaḥ karmaniścayekiṃ nu karma svabhāvo'yaṃ jñānaṃ karmeti vā punaḥ

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