Bhagavad Gita 18.47

18.47 Better is one's own duty (though) destitute of merits, than the duty of another well performed. He who does the duty ordained by his own nature incurs no sin.

It is better to engage in one’s own occupation, even though one may perform it imperfectly, than to accept another’s occupation and perform it perfectly. Duties prescribed according to one’s nature are never affected by sinful reactions.