Mahabharata 6.26.17

कर्मणो ह्यपि बोद्धव्यं बोद्धव्यं च विकर्मणःअकर्मणश्च बोद्धव्यं गहना कर्मणो गतिः

karmaṇo hyapi boddhavyaṃ boddhavyaṃ ca vikarmaṇaḥakarmaṇaśca boddhavyaṃ gahanā karmaṇo gatiḥ

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