Your part is the effort itself — this verse gently lifts the weight of outcomes you were never meant to carry.
कर्मण्येवाधिकारस्ते मा फलेषु कदाचन। मा कर्मफलहेतुर्भूर्मा ते सङ्गोऽस्त्वकर्मणि।।2.47।।
karmaṇy-evādhikāras te mā phaleṣhu kadāchana mā karma-phala-hetur bhūr mā te saṅgo ’stvakarmaṇi
Thy right is to work only; but never to the fruits thereof. Be thou not the producer of the fruits of (thy) actions; neither let thy attachment be towards inaction.
— Swami Swarupananda