Bhagavad Gita 4.17

कर्मणो ह्यपि बोद्धव्यं बोद्धव्यं च विकर्मणः।अकर्मणश्च बोद्धव्यं गहना कर्मणो गतिः॥

karmaṇo hyapi boddhavyaṃ boddhavyaṃ ca vikarmaṇaḥ |akarmaṇaśca boddhavyaṃ gahanā karmaṇo gatiḥ ||

For verily, the true nature of action enjoined by the scriptures should be known, as well as that of forbidden or unlawful action, and of inaction; the nature of action is hard to understand.

It is necessary to consider what is right action, what is wrong action, and what is inaction, for the law of action is mysterious.

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