mayi sarvāṇi karmāṇi sannyasyādhyātma-chetasā
nirāśhīr nirmamo bhūtvā yudhyasva vigata-jvaraḥ
Performing all works as an offering unto me, constantly meditate on me as the Supreme. Become free from desire and selfishness, and with your mental grief departed, fight!
Word by Word Meaning:
mayi - unto me
sarvāṇi - all
karmāṇi - works
sannyasya - renouncing completely
adhyātma-chetasā - with the thoughts resting on God
nirāśhīḥ - free from hankering for the results of the actions
nirmamaḥ - without ownership
bhūtvā - so being
yudhyasva - fight
vigata-jvaraḥ - without mental fever