कर्मण्येवाधिकारस्ते मा फलेषु कदाचन। मा कर्मफलहेतुर्भूर्मा ते सङ्गोऽस्त्वकर्मणि ॥
karmaṇyevādhikāraste mā phaleṣu kadācana mā karmaphalaheturbhūrmā te saṅgo.astvakarmaṇi
Your business is with action alone not by any means with fruit. Let not the fruit of action be your motive (to action). Let not your attachment be (fixed) on inaction.